Use enums in withings (#61987)

homeassistant/components/withings/binary_sensor.py

@@ -2,8 +2,8 @@
 from __future__ import annotations
 
 from homeassistant.components.binary_sensor import (
-    DEVICE_CLASS_OCCUPANCY,
     DOMAIN as BINARY_SENSOR_DOMAIN,
+    BinarySensorDeviceClass,
     BinarySensorEntity,
 )
 from homeassistant.config_entries import ConfigEntry
@@ -29,7 +29,7 @@ async def async_setup_entry(
 class WithingsHealthBinarySensor(BaseWithingsSensor, BinarySensorEntity):
     """Implementation of a Withings sensor."""
 
-    _attr_device_class = DEVICE_CLASS_OCCUPANCY
+    _attr_device_class = BinarySensorDeviceClass.OCCUPANCY
 
     @property
     def is_on(self) -> bool: