Update wilfa_haze_hu400bc_humidifier.yaml

The "air clean" switch toggles the units heating mode. The actual plasma/ion feature is toggled via the Ionizer switch, that is the only air cleaning feature this device has.

custom_components/tuya_local/devices/wilfa_haze_hu400bc_humidifier.yaml

@@ -158,7 +158,7 @@ entities:
           - dps_val: "12"
             value: "12h"
   - entity: switch
-    name: Air clean
+    name: Heat
     category: config
     icon: "mdi:air-purifier"
     dps: