fix changing question type

SurveyBackend/SurveyBackend.API/Controllers/QuestionController.cs

@@ -71,7 +71,8 @@ public class QuestionController : ControllerBase
         var question = QuestionMapper.QuestionUpdateToModel(dto, id);
         await _questionService.UpdateQuestionAsync(question);
         var updatedQuestion = await _questionService.GetQuestionByIdAsync(id);
-        return Ok(updatedQuestion);
+        var result = QuestionMapper.ModelToQuestionDto(updatedQuestion);
+        return Ok(result);
     }
 
     /// <summary>