docs: def update_confirmation(self, confirmation_id, confirmation_dict):
          """
          Updates a confirmation
  
          :param confirmation_id: the confirmation id
          :param confirmation_dict: dict
          :return: dict
          """
          return self._create_put_request(
              resource=CONFIRMATIONS,
              billomat_id=confirmation_id,
              send_data=confirmation_dict
          )