Address late QNAP QSW strict typing comments (#71628)

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

homeassistant/components/qnap_qsw/coordinator.py

@@ -31,10 +31,9 @@ class QswUpdateCoordinator(DataUpdateCoordinator[dict[str, Any]]):
             _LOGGER,
             name=DOMAIN,
             update_interval=SCAN_INTERVAL,
-            update_method=self._async_update,
         )
 
-    async def _async_update(self) -> dict[str, Any]:
+    async def _async_update_data(self) -> dict[str, Any]:
         """Update data via library."""
         async with async_timeout.timeout(QSW_TIMEOUT_SEC):
             try: