Fix template whitespace error (#26631)

Summary:
Very small update here. 0fcaca8 accidentally introduced a whitespace error (trailing whitespace) in an iOS test file - This whitespace error is now propagated into all new projects generated by `react-native init`. This fixes it.

## Changelog

[iOS] [Fixed] - Template whitespace error
Pull Request resolved: #26631

Test Plan: N/A

Differential Revision: D17661040

Pulled By: cpojer

fbshipit-source-id: 1858d2fe238d139894738187ec73f1e27e306294

template/ios/HelloWorldTests/HelloWorldTests.m

@@ -59,7 +59,7 @@ - (void)testRendersWelcomeScreen
       return NO;
     }];
   }
-  
+
 #ifdef DEBUG
   RCTSetLogFunction(RCTDefaultLogFunction);
 #endif