fix: do not replace "fn" with "static function"

Signed-off-by: Thorsten Frommen <info@tfrommen.de>

Inpsyde/Sniffs/CodeQuality/StaticClosureSniff.php

@@ -90,7 +90,7 @@ private function fix(int $position, File $file): void
         $fixer = $file->fixer;
         $fixer->beginChangeset();
 
-        $fixer->replaceToken($position, 'static function');
+        $fixer->addContentBefore($position, 'static ');
 
         $fixer->endChangeset();
     }