Attempt to fix Rector cache again

rector.php

@@ -1,5 +1,6 @@
 <?php
 
+use Rector\Caching\ValueObject\Storage\FileCacheStorage;
 use Rector\Config\RectorConfig;
 
 return RectorConfig::configure()
@@ -14,6 +15,7 @@ return RectorConfig::configure()
     ])
     ->withCache(
         cacheDirectory: __DIR__ . '/.rector.cache',
+        cacheClass: FileCacheStorage::class,
     )
     ->withTypeCoverageLevel(0)
     ->withDeadCodeLevel(0)