fix data_source_detail_dict parameter error (#2000)

Co-authored-by: jyong <jyong@dify.ai>

api/controllers/console/datasets/datasets_document.py

             }
         else:
             process_rules = DatasetService.get_process_rules(dataset_id)
-            data_source_info = document.data_source_detail_dict_()
+            data_source_info = document.data_source_detail_dict
             response = {
                 'id': document.id,
                 'position': document.position,