[mirotalksfu] - fix typo

public/views/Room.html

@@ -115,7 +115,7 @@ access to use this app.
                 <button id="initAudioButton" class="fas fa-microphone" onclick="handleAudio(event)"></button>
                 <button id="initVideoButton" class="fas fa-video" onclick="handleVideo(event)"></button>
                 <button id="initAudioVideoButton" class="fas fa-eye" onclick="handleAudioVideo(event)"></button>
-                <button id="initStartScreenButton" class="" onclick="toggleScreenSharing()">
+                <button id="initStartScreenButton" class="hidden" onclick="toggleScreenSharing()">
                     <i class="fas fa-desktop"></i>
                 </button>
                 <button id="initStopScreenButton" class="hidden" onclick="toggleScreenSharing()">