Add water_heater_mode to case

Author: bouwew

plugwise/smile.py

@@ -233,7 +233,7 @@ async def set_select(
     ) -> None:
         """Set a dhw/gateway/regulation mode or the thermostat schedule option."""
         match key:
-            case "select_dhw_mode":
+            case "select_dhw_mode" or "water_heater_mode":
                 await self.set_dhw_mode(option)
             case "select_gateway_mode":
                 await self.set_gateway_mode(option)