style: fix code style in DumpFixer

Author: mawiswiss

src/Fixer/DumpFixer.php

@@ -52,7 +52,7 @@ public function getDefinition(): FixerDefinitionInterface
     {
         return new FixerDefinition(
             'Removes dump/var_dump statements, which shouldn\'t be in production ever.',
-            [new CodeSample("<?php\nvar_dump(false);")]
+            [new CodeSample("<?php\nvar_dump(false);")],
         );
     }