Fix incorrect type hint in async_setup_scanner (#63833)

Co-authored-by: epenet <epenet@users.noreply.github.com>

homeassistant/components/icloud/device_tracker.py

@@ -27,7 +27,7 @@ async def async_setup_scanner(
     config: ConfigType,
     see: Callable[..., Awaitable[None]],
     discovery_info: DiscoveryInfoType | None = None,
-) -> None:
+) -> bool:
     """Old way of setting up the iCloud tracker."""