Bump actions/upload-pages-artifact (#378)

Bumps the all-github-actions group in /.github/workflows with 1 update: [actions/upload-pages-artifact](https://github.com/actions/upload-pages-artifact).


Updates `actions/upload-pages-artifact` from 3 to 4
- [Release notes](https://github.com/actions/upload-pages-artifact/releases)
- [Commits](actions/upload-pages-artifact@v3...v4)

---
updated-dependencies:
- dependency-name: actions/upload-pages-artifact
  dependency-version: '4'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: all-github-actions
...

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Author: dependabot[bot]

.github/workflows/doxygen-gh-pages.yml

@@ -57,7 +57,7 @@ jobs:
         shell: bash
 
       - name: Upload static files as artifact
-        uses: actions/upload-pages-artifact@v3
+        uses: actions/upload-pages-artifact@v4
         with:
           path: html