another broken icon on dropdown example

Former-commit-id: 0244326be1
Former-commit-id: c356ca1ba7

node/src/documents/modules/dropdown.html.eco

@@ -127,7 +127,7 @@ type        : 'UI Module'
           <i class="user icon"></i> Browse
         </a>
         <a class="item">
-          <i class="book icon"></i> Help
+          <i class="question icon"></i> Help
         </a>
       </div>
     </div>
@@ -230,7 +230,7 @@ type        : 'UI Module'
         </div>
       </div>
       <div class="ui top left pointing dropdown button">
-        <i class="community icon"></i>
+        <i class="users icon"></i>
         <div class="menu">
           <div class="item"><i class="edit icon"></i>Edit Group</div>
           <div class="item"><i class="delete icon"></i>Remove Group</div>