Fix aiohttp deprecation message

ClientResponseError's code property has been deprecated since version
3.1 and is replaced by the equivalent status property.

moonraker_api/websockets/websocketclient.py

@@ -306,7 +306,7 @@ async def set_exception(exception: BaseException) -> None:
 
             except ClientResponseError as error:
                 _LOGGER.warning("Websocket request error: %s", error)
-                if error.code == 401:
+                if error.status == 401:
                     _LOGGER.error("API access is unauthorized")
                     self.state = WEBSOCKET_STATE_STOPPING
                     await set_exception(ClientNotAuthenticatedError)