build(deps): bump actions/cache from v1 to v2.1.2 (GH-22919)

Bumps [actions/cache](https://github.com/actions/cache) from v1 to v2.1.2.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/actions/cache/releases">actions/cache's releases</a>.</em></p>
<blockquote>
<h2>v2.1.2</h2>
<ul>
<li>Adds input to limit the chunk upload size, useful for self-hosted runners with slower upload speeds</li>
<li>No-op when executing on GHES</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="d1255ad936"><code>d1255ad</code></a> Merge pull request <a href="https://github-redirect.dependabot.com/actions/cache/issues/424">GH-424</a> from actions/dhadka/upload-chunk-size</li>
<li><a href="68cfb2ccb7"><code>68cfb2c</code></a> Add units to description</li>
<li><a href="cce3c03a74"><code>cce3c03</code></a> Add new input to action.yml</li>
<li><a href="4bceb75b5b"><code>4bceb75</code></a> Use parseInt instead of Number to handle empty strings</li>
<li><a href="a6f1f4b32e"><code>a6f1f4b</code></a> Adds input for upload chunk size</li>
<li><a href="d606e039ae"><code>d606e03</code></a> Merge pull request <a href="https://github-redirect.dependabot.com/actions/cache/issues/421">GH-421</a> from actions/dhadka/ghes</li>
<li><a href="d3e4f218f3"><code>d3e4f21</code></a> Use warning instead of info</li>
<li><a href="55a5894438"><code>55a5894</code></a> Update dist</li>
<li><a href="3f6dfcbcc4"><code>3f6dfcb</code></a> Merge branch 'main' of <a href="http://github.com/actions/cache">http://github.com/actions/cache</a> into dhadka/ghes</li>
<li><a href="0f71d4ac9a"><code>0f71d4a</code></a> Add tests for isGhes</li>
<li>Additional commits viewable in <a href="https://github.com/actions/cache/compare/v1...d1255ad9362389eac595a9ae406b8e8cb3331f16">compare view</a></li>
</ul>
</details>
<br />

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</details>

Automerge-Triggered-By: GH:Mariatta
(cherry picked from commit cd0edbc716)

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/build.yml

@@ -97,7 +97,7 @@ jobs:
       run: sudo ./.github/workflows/posix-deps-apt.sh
     - name: 'Restore OpenSSL build'
       id: cache-openssl
-      uses: actions/cache@v1
+      uses: actions/cache@v2.1.2
       with:
         path: ./multissl/openssl/${{ env.OPENSSL_VER }}
         key: ${{ runner.os }}-multissl-openssl-${{ env.OPENSSL_VER }}

.github/workflows/coverage.yml

@@ -30,7 +30,7 @@ jobs:
       run: sudo ./.github/workflows/posix-deps-apt.sh
     - name: 'Restore OpenSSL build'
       id: cache-openssl
-      uses: actions/cache@v1
+      uses: actions/cache@v2.1.2
       with:
         path: ./multissl/openssl/${{ env.OPENSSL_VER }}
         key: ${{ runner.os }}-multissl-openssl-${{ env.OPENSSL_VER }}