Update another chat link

Author: ramsey

index.html

@@ -32,7 +32,7 @@
             <div class="collapse navbar-collapse" id="navbarSupportedContent">
                 <ul class="navbar-nav mr-auto">
                     <li class="nav-item">
-                        <a class="u-url nav-link" href="https://matrix.to/#/%23phpc:matrix.org">Chat</a>
+                        <a class="u-url nav-link" href="https://phpc.chat">Chat</a>
                     </li>
                     <li class="nav-item">
                         <a class="u-url nav-link" href="https://talk.phpcommunity.org">Discourse</a>