fix (avatto_wtr20r_thermostat): fix type of manual override

Issue #3857

custom_components/tuya_local/devices/avatto_wt20r_thermostat.yaml

@@ -105,7 +105,7 @@ entities:
     category: diagnostic
     dps:
       - id: 32
-        type: boolean
+        type: string
         optional: true
         name: sensor
         mapping: