Geyserwise: fix element running sensor

DP name was not updated when moving it from an extra attribute
of the water_heater entity.

custom_components/tuya_local/devices/geyserwise_water_heater.yaml

@@ -60,7 +60,7 @@ secondary_entities:
     dps:
       - id: 13
         type: string
-        name: element
+        name: sensor
         mapping:
           - dps_val: "Off"
             value: false