fix(jaas) replace only the first slash in a pathname

react/features/base/connection/functions.js

 
     if (inviteDomain) {
         const meetingId
-            = state['features/base/config'].brandingRoomAlias || urlWithoutParams.pathname.replace('/', '');
+            = state['features/base/config'].brandingRoomAlias || urlWithoutParams.pathname.replace(/\//, '');
 
         return `${inviteDomain}/${meetingId}`;
     }