Kesser IR wall heater: expand temperature range down to 7C

Issue #3277

custom_components/tuya_local/devices/kesser_infrared_wall_heater.yaml

@@ -20,7 +20,7 @@ entities:
         type: integer
         unit: C
         range:
-          min: 10
+          min: 7
           max: 30
       - id: 3
         type: integer