Update actions/upload-pages-artifact action to v5 (#2006)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/deploy.yml

@@ -25,7 +25,7 @@ jobs:
           # Don't cache it to track updates.
           pip install mkdocs-material
           mkdocs build
-      - uses: actions/upload-pages-artifact@v4
+      - uses: actions/upload-pages-artifact@v5
         with:
           path: site
       - uses: actions/deploy-pages@v5