Nue fan and light: fix dp naming after moving into own entity

PR #2737

custom_components/tuya_local/devices/nue_smart_fan_3speed_light.yaml

@@ -42,6 +42,6 @@ entities:
     class: duration
     dps:
       - id: 7
-        name: countdown_left
+        name: sensor
         type: integer
         unit: min