fix: Update roborock/devices/device.py

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: allenporter

roborock/devices/device.py

@@ -148,6 +148,10 @@ async def close(self) -> None:
         """Close all connections to the device."""
         if self._connect_task:
             self._connect_task.cancel()
+            try:
+                await self._connect_task
+            except asyncio.CancelledError:
+                pass
         if self._unsub:
             self._unsub()
             self._unsub = None