Revert "Properly display article titles (#6455)" (#6465)

This reverts commit e71b40a.

kitsune/products/jinja2/products/includes/topic_macros.html

@@ -27,7 +27,7 @@ <h3 class="card--title">
         {% for document in topic_data.documents %}
         <li>
           <a href="{{ document.url }}">      
-            {{ document.title }}</a>
+            {{ document.document_title }}</a>
         </li>
         {% endfor %}
       </ul>