Issue #3425637: Twitter logo needs to be changed to the X

Closes #3425637

templates/page--401.html.twig

@@ -161,7 +161,7 @@
             <h6>Connect With Us</h6>
             <div class="social">
                 <a href="{{facebook}}" class="facebook"><i class="fa fa-facebook"></i></a>
-                <a href="{{twitter}}" class="twitter"><i class="fa fa-twitter"></i></a>                
+                <a href="{{twitter}}" class="twitter"><i class="fa fa-brands fa-x-twitter"></i></a>                
                 <a href="{{google-plus}}" class="google-plus"><i class="fa fa-google-plus"></i></a>
             </div>
           </div>