aioble: Fix advertising variable name to use us not ms.

Author: bhavesh-k

micropython/bluetooth/aioble/README.md

@@ -108,7 +108,7 @@ _ENV_SENSE_UUID = bluetooth.UUID(0x181A)
 _ENV_SENSE_TEMP_UUID = bluetooth.UUID(0x2A6E)
 _GENERIC_THERMOMETER = const(768)
 
-_ADV_INTERVAL_MS = const(250000)
+_ADV_INTERVAL_US = const(250000)
 
 temp_service = aioble.Service(_ENV_SENSE_UUID)
 temp_char = aioble.Characteristic(temp_service, _ENV_SENSE_TEMP_UUID, read=True, notify=True)
@@ -117,7 +117,7 @@ aioble.register_services(temp_service)
 
 while True:
     connection = await aioble.advertise(
-            _ADV_INTERVAL_MS,
+            _ADV_INTERVAL_US,
             name="temp-sense",
             services=[_ENV_SENSE_UUID],
             appearance=_GENERIC_THERMOMETER,