Bump actions/upload-pages-artifact from 3.0.1 to 4.0.0 (#848)

Bumps [actions/upload-pages-artifact](https://github.com/actions/upload-pages-artifact) from 3.0.1 to 4.0.0.
- [Release notes](https://github.com/actions/upload-pages-artifact/releases)
- [Commits](56afc609e7...7b1f4a764d)

---
updated-dependencies:
- dependency-name: actions/upload-pages-artifact
  dependency-version: 4.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/docs.yml

@@ -40,7 +40,7 @@ jobs:
       run: make generate-docs
 
     - name: Upload Pages artifact
-      uses: actions/upload-pages-artifact@56afc609e74202658d3ffba0e8f6dda462b719fa # v3.0.1
+      uses: actions/upload-pages-artifact@7b1f4a764d45c48632c6b24a0339c27f5614fb0b # v4.0.0
       with:
         path: 'artifacts/_site'