fix (breville?airrounderplus_heater): rename heat_mode in constraint

Issue #3582

custom_components/tuya_local/devices/breville_airrounderplus_heater.yaml

@@ -16,7 +16,7 @@ entities:
           - dps_val: true
             value: heat
             hidden: true
-            constraint: preset_mode
+            constraint: heat_mode
             conditions:
               - dps_val: heat_low
                 value: fan_only