fix: phpstan

Signed-off-by: memleakd <121398829+memleakd@users.noreply.github.com>

Author: memleakd

tests/system/Models/ChunkByIdModelTest.php

@@ -259,6 +259,9 @@ public function testChunkRowsByIdThrowsOnZeroSize(): void
         $this->createModel(UserModel::class)->chunkRowsById(0, static function ($rows): void {});
     }
 
+    /**
+     * @param array<string, mixed>|object $row
+     */
     private static function userId(array|object $row): int
     {
         $data = (array) $row;