build(deps): bump actions/upload-artifact from 2.2.4 to 2.3.1 (GH-30325)

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 2.2.4 to 2.3.1.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](https://github.com/actions/upload-artifact/compare/v2.2.4...v2.3.1)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

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

.github/workflows/doc.yml

@@ -48,7 +48,7 @@ jobs:
     - name: 'Build HTML documentation'
       run: make -C Doc/ PYTHON=../python SPHINXOPTS="-q -W --keep-going -j4" html
     - name: 'Upload'
-      uses: actions/upload-artifact@v2.2.4
+      uses: actions/upload-artifact@v2.3.1
       with:
         name: doc-html
         path: Doc/build/html