fix(news): created date in post list

src/app/post/components/post-card/post-card.component.html

@@ -30,7 +30,7 @@
     <div fxLayout="column" class="informations">
       <div>{{ post.author }}</div>
       <div>
-        {{ post.updated_at | date: 'd MMM y' }}
+        {{ post.created_at | date: 'd MMM y' }}
       </div>
     </div>
   </div>