MT29/15 airbox: dp 4 is Carbon Dioxide

Issue #3054

custom_components/tuya_local/devices/mustool_mt15mt29_airbox.yaml

@@ -35,7 +35,7 @@ entities:
         unit: "%"
         class: measurement
   - entity: sensor
-    class: carbon_monoxide
+    class: carbon_dioxide
     dps:
       - id: 4
         type: integer