content: Update GitHub Pages workflow example

Use  upload-pages-artifact@v5 instead of upload-pages-artifact@v3.

Author: jmooring

content/en/host-and-deploy/host-on-github-pages/index.md

@@ -150,7 +150,7 @@ Step 4
             path: ${{ runner.temp }}/hugo_cache
             key: ${{ steps.cache-restore.outputs.cache-primary-key }}
         - name: Upload artifact
-          uses: actions/upload-pages-artifact@v3
+          uses: actions/upload-pages-artifact@v5
           with:
             path: ./public
     deploy: