Fix aioble README const name: ADDR_PUBLIC

Signed-off-by: Garry W <32130780+garywill@users.noreply.github.com>

micropython/bluetooth/aioble/README.md

@@ -93,7 +93,7 @@ async with aioble.scan(duration_ms=5000, interval_us=30000, window_us=30000, act
 # Either from scan result
 device = result.device
 # Or with known address
-device = aioble.Device(aioble.PUBLIC, "aa:bb:cc:dd:ee:ff")
+device = aioble.Device(aioble.ADDR_PUBLIC, "aa:bb:cc:dd:ee:ff")
 
 try:
     connection = await device.connect(timeout_ms=2000)