Fix GeneratorCacheWarmer with Symfony 7 (#346)

* Fix GeneratorCacheWarmer with Symfony 7

* Update CacheWarmer/GeneratorCacheWarmer.php

---------

Co-authored-by: Bob van de Vijver <[email protected]>

Author: tobias-93

CacheWarmer/GeneratorCacheWarmer.php

@@ -19,7 +19,7 @@ public function __construct(protected GeneratorCacheBuilder $generatorCacheBuild
     {
     }
 
-    public function warmUp(string $cacheDir): array
+    public function warmUp(string $cacheDir, ?string $buildDir = null): array
     {
         $this->generatorCacheBuilder->buildFull();