rector/config/set/rector-config.php

<?php

declare (strict_types=1);
namespace RectorPrefix20220531;

use Rector\Config\RectorConfig;
use Rector\DogFood\Rector\Closure\UpgradeRectorConfigRector;
return static function (\Rector\Config\RectorConfig $rectorConfig) : void {
    $rectorConfig->rule(\Rector\DogFood\Rector\Closure\UpgradeRectorConfigRector::class);
};