docs: Fix HTML sample in responsive guide

Author: szuperaz

docusaurus/docs/Angular/code-examples/responsive-layout.mdx

@@ -22,13 +22,13 @@ Let's create a simple chat application UI:
   <stream-channel class="channel">
     <stream-channel-header> </stream-channel-header>
     <stream-message-list></stream-message-list>
+    <stream-notification-list></stream-notification-list>
     <stream-message-input></stream-message-input>
     <stream-thread class="thread" name="thread">
       <stream-message-list mode="thread"></stream-message-list>
       <stream-message-input mode="thread"></stream-message-input>
     </stream-thread>
   </stream-channel>
-  <stream-notification-list></stream-notification-list>
 </div>
 ```