ci(pages): robust Jekyll GitHub Pages workflow with Gemfile fallback

Signed-off-by: https://github.com/Someshdiwan <someshdiwan369@gmail.com>

Author: Someshdiwan

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

@@ -122,4 +122,4 @@ jobs:
           artifact_name: java-evolution-pages
 
       - name: Output deploy URL
-        run: echo "Deployed to ${{ steps.deployment.outputs.page_url }}"
+        run: echo "Deployed to ${{ steps.deployment.outputs.page_url }}"