docs: def update_confirmation_item(self, confirmation_item_id, confirmation_item_dict):
          """
          Updates a confirmation item
  
          :param confirmation_item_id: the confirmation item id
          :param confirmation_item_dict: dict
          :return: dict
          """
          return self._create_put_request(
              resource=CONFIRMATION_ITEMS,
              billomat_id=confirmation_item_id,
              send_data=confirmation_item_dict
          )