Note behavior of ZOOZ 4-in-1 sensor

The low_battery_level sensor actually fires for this device, although
reporting as 80% seems a bit high.

The Low Battery Notification automation portion in this file may need
to be moved into a new file if it continues to be documented on.

automation/sensors.yaml

@@ -31,6 +31,8 @@
   trigger:
     - platform: state
       entity_id:
+        # Sensor fires at 80% battery level remaining then device is mostly
+        # off the network and otherwise unresponsive.
         - binary_sensor.4_in_1_sensor_low_battery_level
         - binary_sensor.flood_sensor_low_battery_level
         - binary_sensor.z_wave_door_window_sensor_low_battery_level