Fix markdown in requiresMainQueueSetup warning

Summary:
nit-picking

[IOS] [MINOR] [React/Base/RCTModuleData.mm] - Fix markdown in `requiresMainQueueSetup` warning
Closes #16916

Differential Revision: D6394725

Pulled By: shergin

fbshipit-source-id: 272c5a6ee529af0b162230e8a07275043a888907

React/Base/RCTModuleData.mm

@@ -65,7 +65,7 @@ - (void)setUp
         methodName = "init";
       }
       RCTLogWarn(@"Module %@ requires main queue setup since it overrides `%s` but doesn't implement "
-        "`requiresMainQueueSetup. In a future release React Native will default to initializing all native modules "
+        "`requiresMainQueueSetup`. In a future release React Native will default to initializing all native modules "
         "on a background thread unless explicitly opted-out of.", _moduleClass, methodName);
     }
   }