[mirotalksfu] - add color

public/views/Room.html

@@ -277,7 +277,7 @@ access to use this app.
                             <p>Lock room</p>
                         </button>
                         <button id="unlockRoomButton" class="hidden btn-custom">
-                            <i class="fas fa-lock"></i>
+                            <i class="fas fa-lock yellow"></i>
                             <p>Unlock room</p>
                         </button>
                         <button id="sendEmailInvitation" class="hidden btn-custom">