Update upload pages artifact action version

Author: natke

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

@@ -117,7 +117,7 @@ jobs:
           sudo mv ./build/* ./_site
 
       - name: Upload site
-        uses: actions/upload-pages-artifact@v1
+        uses: actions/upload-pages-artifact@v3
         with:
           retention-days: 21