Hysen HY08ACF: fix temperature icons

custom_components/tuya_local/devices/hysen_hy08acf_thermostat.yaml

@@ -165,7 +165,7 @@ secondary_entities:
     name: Maximum temperature
     category: config
     class: temperature
-    icon: "mdi:temperature-chevron-up"
+    icon: "mdi:thermometer-chevron-up"
     dps:
       - id: 103
         type: integer
@@ -178,7 +178,7 @@ secondary_entities:
     name: Minimum temperature
     category: config
     class: temperature
-    icon: "mdi:temperature-chevron-down"
+    icon: "mdi:thermometer-chevron-down"
     dps:
       - id: 104
         type: integer