Inkbird ITC-308: add product id

From discussion #1144

custom_components/tuya_local/devices/inkbird_itc308_thermostat.yaml

@@ -1,4 +1,7 @@
-name: Inkbird ITC-308 thermostat
+name: Thermostat switch
+products:
+  - id: B0eP8qYAdpUo4yR9
+    name: Inkbird ITC-308
 primary_entity:
   entity: climate
   dps: