Bump actions/upload-pages-artifact from 3 to 4 in /.github/workflows

Bumps [actions/upload-pages-artifact](https://github.com/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
...

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

Author: dependabot[bot]

.github/workflows/deploy-docsite.yml

@@ -53,7 +53,7 @@ jobs:
             - name: Upload Build Artifact
               # Only upload the build artifact when pushed to the main branch
               if: github.event_name == 'push' && github.ref == 'refs/heads/main'
-              uses: actions/upload-pages-artifact@v3
+              uses: actions/upload-pages-artifact@v4
               with:
                   path: docs/build
     deploy: