Fix test for L9

Author: mbardelmeijer

tests/Conversions/Commands/CleanCommandTest.php

@@ -287,7 +287,7 @@
         ->toMediaCollection('collection1');
 
     // Delete quietly to avoid deleting the related media file.
-    $mediaToDelete->model->deleteQuietly();
+    $mediaToDelete->model->deletePreservingMedia();
 
     $this->artisan('media-library:clean', [
         '--delete-orphaned' => 'true',