Fix code issue

Author: javiereguiluz

src/Security/PostVoter.php

@@ -66,5 +66,7 @@ protected function voteOnAttribute(string $attribute, $post, TokenInterface $tok
         }
 
         $vote?->addReason(\sprintf('You can\'t %s this blog post because you are not its author.', $attribute));
+
+        return false;
     }
 }