Update heater wattage unit to uppercase 'W'

custom_components/tuya_local/devices/drexma_et7aw_thermostat.yaml

@@ -282,7 +282,7 @@ entities:
       - id: 116
         type: integer
         name: value
-        unit: w
+        unit: W
         range:
           min: 0
           max: 4500