Add missing enforceLayout value 'MEDIA_ONLY'

BBB 3.0

Author: samuelwei

src/Enum/MeetingLayout.php

@@ -34,4 +34,5 @@ enum MeetingLayout: string
     case CAMERAS_ONLY = 'CAMERAS_ONLY';
     case PARTICIPANTS_CHAT_ONLY = 'PARTICIPANTS_CHAT_ONLY';
     case PRESENTATION_ONLY = 'PRESENTATION_ONLY';
+    case MEDIA_ONLY = 'MEDIA_ONLY';
 }