Sets ``Content-Disposition`` header.

def set_content_disposition(self,
                                disptype: str,
                                quote_fields: bool=True,
                                **params: Any) -> None:
        """Sets ``Content-Disposition`` header."""
        self._headers[hdrs.CONTENT_DISPOSITION] = content_disposition_header(
            disptype, quote_fields=quote_fields, **params)