fix(storage): use latest StorageWrapper signature

Signed-off-by: Max <[email protected]>

lib/ACL/ACLStorageWrapper.php

@@ -164,7 +164,7 @@ public function is_file($path): bool {
 			parent::is_file($path);
 	}
 
-	public function stat($path) {
+	public function stat(string $path): array | false {
 		if (!$this->checkPermissions(Constants::PERMISSION_READ)) {
 			return false;
 		}