Arida Venti 160: add missing icon

custom_components/tuya_local/devices/arida_venti160_hrv.yaml

@@ -130,7 +130,7 @@ entities:
         name: sensor
   - entity: switch
     name: CO2 control
-    icon: 
+    icon: "mdi:molecule-co2"
     category: config
     dps:
       - id: 103