Change response key in create FieldValuesResource

Author: tjardoo

src/Resources/ActiveCampaignFieldValuesResource.php

@@ -44,7 +44,7 @@ public function create(int $contactId, string $fieldId, string $value, bool $use
                 ],
                 'useDefaults' => $useDefaults,
             ],
-            responseKey: 'contact'
+            responseKey: 'fieldValue'
         );
 
         return $fieldValue['id'];