.github: update actions/cache to v4 to remove node version warning

The following actions use a deprecated Node.js version and will be forced to run on node20: actions/cache@v3.

.github/workflows/colcon.yml

@@ -156,7 +156,7 @@ jobs:
           NOW=$(date -u +"%F-%T")
           echo "timestamp=${NOW}" >> $GITHUB_OUTPUT
       - name: ccache cache files
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ~/.ccache
           key: ${{github.workflow}}-ccache-${{steps.ccache_cache_timestamp.outputs.timestamp}}

.github/workflows/cygwin_build.yml

@@ -177,7 +177,7 @@ jobs:
           source ~/ccache.conf &&
           ccache -s
       - name: ccache cache files
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: D:/a/ardupilot/ardupilot/ccache
           key: ${{ steps.ccache_cache_timestamp.outputs.cache-key }}-ccache-${{steps.ccache_cache_timestamp.outputs.timestamp}}

.github/workflows/macos_build.yml

@@ -169,7 +169,7 @@ jobs:
           NOW=$(date -u +"%F-%T")
           echo "timestamp=${NOW}" >> $GITHUB_OUTPUT
       - name: ccache cache files
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ~/.ccache
           key: ${{github.workflow}}-ccache-${{matrix.config}}-${{steps.ccache_cache_timestamp.outputs.timestamp}}

.github/workflows/test_chibios.yml

@@ -182,7 +182,7 @@ jobs:
           NOW=$(date -u +"%F-%T")
           echo "timestamp=${NOW}" >> $GITHUB_OUTPUT
       - name: ccache cache files
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ~/.ccache
           key: ${{github.workflow}}-ccache-${{matrix.config}}-${{ matrix.toolchain }}-${{ matrix.gcc }}-${{steps.ccache_cache_timestamp.outputs.timestamp}}

.github/workflows/test_coverage.yml

@@ -48,7 +48,7 @@ jobs:
           NOW=$(date -u +"%F-%T")
           echo "timestamp=${NOW}" >> $GITHUB_OUTPUT
       - name: ccache cache files
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ~/.ccache
           key: ${{github.workflow}}-ccache-${{ matrix.toolchain }}-${{steps.ccache_cache_timestamp.outputs.timestamp}}

.github/workflows/test_dds.yml

@@ -161,7 +161,7 @@ jobs:
           NOW=$(date -u +"%F-%T")
           echo "timestamp=${NOW}" >> $GITHUB_OUTPUT
       - name: ccache cache files
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ~/.ccache
           key: ${{github.workflow}}-ccache-${{ matrix.config }}-${{steps.ccache_cache_timestamp.outputs.timestamp}}

.github/workflows/test_linux_sbc.yml

@@ -181,7 +181,7 @@ jobs:
           NOW=$(date -u +"%F-%T")
           echo "timestamp=${NOW}" >> $GITHUB_OUTPUT
       - name: ccache cache files
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ~/.ccache
           key: ${{github.workflow}}-ccache-${{matrix.config}}-${{ matrix.toolchain }}-${{steps.ccache_cache_timestamp.outputs.timestamp}}

.github/workflows/test_replay.yml

@@ -170,7 +170,7 @@ jobs:
           NOW=$(date -u +"%F-%T")
           echo "timestamp=${NOW}" >> $GITHUB_OUTPUT
       - name: ccache cache files
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ~/.ccache
           key: ${{github.workflow}}-ccache-${{ matrix.toolchain }}-${{steps.ccache_cache_timestamp.outputs.timestamp}}

.github/workflows/test_sitl_blimp.yml

@@ -182,7 +182,7 @@ jobs:
           NOW=$(date -u +"%F-%T")
           echo "timestamp=${NOW}" >> $GITHUB_OUTPUT
       - name: ccache cache files
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ~/.ccache
           key: ${{github.workflow}}-ccache-${{ matrix.toolchain }}-${{steps.ccache_cache_timestamp.outputs.timestamp}}

.github/workflows/test_sitl_copter.yml

@@ -181,7 +181,7 @@ jobs:
           NOW=$(date -u +"%F-%T")
           echo "timestamp=${NOW}" >> $GITHUB_OUTPUT
       - name: ccache cache files
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ~/.ccache
           key: ${{github.workflow}}-ccache-${{ matrix.toolchain }}-${{steps.ccache_cache_timestamp.outputs.timestamp}}
@@ -302,7 +302,7 @@ jobs:
           NOW=$(date -u +"%F-%T")
           echo "timestamp=${NOW}" >> $GITHUB_OUTPUT
       - name: ccache cache files
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ~/.ccache
           key: ${{github.workflow}}-ccache-base-${{steps.ccache_cache_timestamp.outputs.timestamp}}

.github/workflows/test_sitl_periph.yml

@@ -172,7 +172,7 @@ jobs:
           NOW=$(date -u +"%F-%T")
           echo "timestamp=${NOW}" >> $GITHUB_OUTPUT
       - name: ccache cache files
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ~/.ccache
           key: ${{github.workflow}}-ccache-${{steps.ccache_cache_timestamp.outputs.timestamp}}
@@ -222,7 +222,7 @@ jobs:
           NOW=$(date -u +"%F-%T")
           echo "timestamp=${NOW}" >> $GITHUB_OUTPUT
       - name: ccache cache files
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ~/.ccache
           key: ${{github.workflow}}-ccache-${{steps.ccache_cache_timestamp.outputs.timestamp}}

.github/workflows/test_sitl_plane.yml

@@ -181,7 +181,7 @@ jobs:
           NOW=$(date -u +"%F-%T")
           echo "timestamp=${NOW}" >> $GITHUB_OUTPUT
       - name: ccache cache files
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ~/.ccache
           key: ${{github.workflow}}-ccache-${{ matrix.toolchain }}-${{steps.ccache_cache_timestamp.outputs.timestamp}}

.github/workflows/test_sitl_rover.yml

@@ -180,7 +180,7 @@ jobs:
           NOW=$(date -u +"%F-%T")
           echo "timestamp=${NOW}" >> $GITHUB_OUTPUT
       - name: ccache cache files
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ~/.ccache
           key: ${{github.workflow}}-ccache-${{ matrix.toolchain }}-${{steps.ccache_cache_timestamp.outputs.timestamp}}

.github/workflows/test_sitl_sub.yml

@@ -184,7 +184,7 @@ jobs:
           NOW=$(date -u +"%F-%T")
           echo "timestamp=${NOW}" >> $GITHUB_OUTPUT
       - name: ccache cache files
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ~/.ccache
           key: ${{github.workflow}}-ccache-${{ matrix.toolchain }}-${{steps.ccache_cache_timestamp.outputs.timestamp}}

.github/workflows/test_sitl_tracker.yml

@@ -183,7 +183,7 @@ jobs:
           NOW=$(date -u +"%F-%T")
           echo "timestamp=${NOW}" >> $GITHUB_OUTPUT
       - name: ccache cache files
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ~/.ccache
           key: ${{github.workflow}}-ccache-${{ matrix.toolchain }}-${{steps.ccache_cache_timestamp.outputs.timestamp}}

.github/workflows/test_size.yml

@@ -97,7 +97,7 @@ jobs:
           NOW=$(date -u +"%F-%T")
           echo "timestamp=${NOW}" >> $GITHUB_OUTPUT
       - name: ccache cache files
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ~/.ccache
           key: ${{github.workflow}}-ccache-${{ matrix.toolchain }}-${{steps.ccache_cache_timestamp.outputs.timestamp}}

.github/workflows/test_unit_tests.yml

@@ -126,7 +126,7 @@ jobs:
           NOW=$(date -u +"%F-%T")
           echo "timestamp=${NOW}" >> $GITHUB_OUTPUT
       - name: ccache cache files
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ~/.ccache
           key: ${{github.workflow}}-ccache-${{ matrix.toolchain }}-${{steps.ccache_cache_timestamp.outputs.timestamp}}