fix test to reflect new m.call.member format

src/rtcSessionHelper.test.ts

@@ -81,6 +81,9 @@ test("It joins the correct Session", async () => {
       focus_selection: "oldest_membership",
       type: "livekit",
     },
-    { manageMediaKeys: false },
+    { 
+      manageMediaKeys: false ,
+      useLegacyMemberEvents: false,
+    },
   );
 });