Use consistent footer on detail pages matching index.html

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: brunoborges

templates/slug-template.html

@@ -190,7 +190,8 @@ <h1>{{title}}</h1>
 {{socialShare}}
 
   <footer>
-    <p>A project by <a href="https://github.com/brunoborges" target="_blank" rel="noopener">Bruno Borges</a></p>
+    <p><a href="/">java.evolved</a> — Java has evolved. Your code can too.</p>
+    <p>Made with ❤️ by <a href="https://github.com/brunoborges" target="_blank" rel="noopener">Bruno Borges</a> and <a href="https://github.com/features/copilot" target="_blank" rel="noopener">GitHub Copilot</a></p>
     <p><a href="https://github.com/javaevolved/javaevolved.github.io" target="_blank" rel="noopener">View on GitHub</a></p>
   </footer>