BAC002 thermostat: add an appropriate icon to the schedule selector.

custom_components/tuya_local/devices/beca_bac002_thermostat_c.yaml

@@ -86,6 +86,7 @@ secondary_entities:
             icon: "mdi:hand-back-right"
   - entity: select
     name: Schedule
+    icon: "mdi:calendar-clock"
     dps:
       - id: 4
         type: string