chore: fix cache file

Author: kenjis

.php-cs-fixer.user-guide.php

@@ -37,7 +37,7 @@
 ];
 
 $options = [
-    'cacheFile' => 'build/.php-cs-fixer.no-header.cache',
+    'cacheFile' => 'build/.php-cs-fixer.user-guide.cache',
     'finder'    => $finder,
 ];