improved comment

Author: lukas-staab

rector.php

@@ -31,8 +31,7 @@
         __DIR__.'/routes',
         __DIR__.'/tests',
     ])
-    // uncomment to reach your current PHP version
-    ->withPhpSets()
+    ->withPhpSets() // defaults to the php version from composer
     ->withTypeCoverageLevel(0)
     ->withDeadCodeLevel(0)
     ->withCodeQualityLevel(0);