fix (kishin_bsdw002_motionsensor): add units to battery sensor

custom_components/tuya_local/devices/kishin_bsdw002_motionsensor.yaml

@@ -22,6 +22,7 @@ entities:
       - id: 3
         type: string
         name: sensor
+        unit: "%"
         mapping:
           - dps_val: low
             value: 20