fix: add missing async keyword to send timeout (#42)

src/bluetooth_auto_recovery/recover.py

@@ -150,7 +150,7 @@ async def send(self, *args: Any) -> btmgmt_protocol.Response:
         self.future = asyncio.Future()
         assert self.transport is not None  # nosec
         self.transport.write(full_pkt)
-        with asyncio_timeout(self.timeout):
+        async with asyncio_timeout(self.timeout):
             return await self.future
 
     def connection_lost(self, exc: Exception | None) -> None: