Fix Nova message test

Author: ivanvermeyen

tests/ValidationMessageTest.php

@@ -149,8 +149,8 @@ public function it_returns_a_default_error_message_when_validating_a_nova_transl
         ]);
 
         $formAttributes = [
-            'translations_form_slug_en' => ['en' => 'existing-slug-en'],
-            'translations_form_name_en' => ['en' => 'existing-name-en'],
+            'translations_form_slug_en' => 'existing-slug-en',
+            'translations_form_name_en' => 'existing-name-en',
         ];
 
         $rules = [