comment with deployment URL

Author: mxmehl

.github/workflows/hugo.yaml

@@ -15,6 +15,7 @@ permissions:
   contents: read
   pages: write
   id-token: write
+  pull-requests: write
 
 # Allow only one concurrent deployment, skipping runs queued between the run in-progress and latest queued.
 # However, do NOT cancel in-progress runs as we want to allow these production deployments to complete.
@@ -133,3 +134,13 @@ jobs:
           source: "public/*"
           rm: true
           strip_components: 1
+
+      - name: Inform about Preview URL
+        uses: marocchino/sticky-pull-request-comment@52423e01640425a022ef5fd42c6fb5f633a02728 # v2.9.1
+        with:
+          header: pr-preview
+          message: |
+            Pull Request Live Preview
+            :---:
+            | <p></p> :rocket: View preview at <br />https://${{ env.preview_subdomain }}.${{ env.domain }}/${{ env.preview_segment }}/<br /><br />
+            | <h6>Built to branch [`gh-pages`](https://github.com/mxmehl/hugo-preview-test/tree/gh-pages) at 2025-03-27 11:34 UTC. <br> Preview will be ready when the [GitHub Pages deployment](https://github.com/mxmehl/hugo-preview-test/deployments) is complete. <br><br> </h6>