BitwiseOrTest: fix up some test descriptions

... to more accurately describe what is being tested.

Author: jrfnl

tests/Core/Tokenizers/PHP/BitwiseOrTest.php

@@ -153,8 +153,8 @@ public static function dataTypeUnion()
             'return type for arrow function'                           => ['/* testTypeUnionArrowReturnType */'],
             'type for function parameter, return by ref'               => ['/* testTypeUnionNonArrowFunctionDeclaration */'],
             'type for function param with true type first'             => ['/* testTypeUnionPHP82TrueFirst */'],
-            'type for function param with true type middle'            => ['/* testTypeUnionPHP82TrueMiddle */'],
-            'type for function param with true type last'              => ['/* testTypeUnionPHP82TrueLast */'],
+            'return type for function with true type middle'           => ['/* testTypeUnionPHP82TrueMiddle */'],
+            'return type for closure with true type last'              => ['/* testTypeUnionPHP82TrueLast */'],
         ];
 
     }//end dataTypeUnion()