Fix heading size on bookmarked comments page

tildes/tildes/templates/bookmarks.jinja2

@@ -28,7 +28,7 @@
     {% if post is topic %}
       {{ render_topic_for_listing(post, show_group=True) }}
     {% elif post is comment %}
-      <h2>Comment on <a href="{{ post.topic.permalink }}">{{ post.topic.title }}</a> in {{ group_linked(post.topic.group.path) }}</h2>
+      <h2 class="heading-post-listing">Comment on <a href="{{ post.topic.permalink }}">{{ post.topic.title }}</a> in {{ group_linked(post.topic.group.path) }}</h2>
       {{ render_single_comment(post) }}
     {% endif %}
     </li>