Updated release notes

Author: sbhed

docs/6-changelog.html

@@ -150,6 +150,9 @@ <h2 id='1-4-0' class='heading'>1.4.0</h2>
 <li>Added support to app switch to MobilePay</li>
 </ul>
 
+<p>Note: From 1st of October 2021, iOS 11.4.1 and below will not be supported.</p>
+
+
           </div>
         </section>