Downgrade actions/upload-pages-artifact from v4 to v3

See:

gohugoio/hugoDocs#3364
actions/upload-pages-artifact#129
actions/upload-pages-artifact#137
actions/upload-pages-artifact#134

Author: jmooring

.github/workflows/hugo.yaml

@@ -91,7 +91,7 @@ jobs:
           path: ${{ runner.temp }}/hugo_cache
           key: ${{ steps.cache-restore.outputs.cache-primary-key }}
       - name: Upload artifact
-        uses: actions/upload-pages-artifact@v4
+        uses: actions/upload-pages-artifact@v3
         with:
           path: ./public
   deploy: