Fix code running blocking

Author: benjamin

src/winrtble/ble/device.rs

@@ -96,7 +96,7 @@ impl BLEDevice {
         service: &GattDeviceService,
     ) -> Result<Vec<GattCharacteristic>> {
         let async_result = service
-            .GetCharacteristicsWithCacheModeAsync(BluetoothCacheMode::Uncached)?
+            .GetCharacteristicsAsync()?
             .await?;
         let status = async_result.Status();
         if status == Ok(GattCommunicationStatus::Success) {