Use Symfony's default dir

Author: Toflar

src/Psr6Store.php

@@ -120,7 +120,7 @@ public function __construct(array $options = [])
             }
 
             return new TagAwareAdapter(
-                new FilesystemAdapter('http-cache-tags', 0, $options['cache_directory'])
+                new FilesystemAdapter('http_cache', 0, $options['cache_directory'])
             );
         })->setAllowedTypes('cache', AdapterInterface::class);