Update actions/upload-pages-artifact action to v4

Author: renovate[bot]

.github/workflows/hugo.yaml

@@ -63,7 +63,7 @@ jobs:
             --minify \
             --baseURL "${{ steps.pages.outputs.base_url }}/"
       - name: Upload artifact
-        uses: actions/upload-pages-artifact@v3.0.1
+        uses: actions/upload-pages-artifact@v4.0.0
         with:
           path: ./site/public