Update fresco_hydrateultra_petfountain_v2.yaml

revert to name and icon for UV sterilization as translation key doesnt work with a button

custom_components/tuya_local/devices/fresco_hydrateultra_petfountain_v2.yaml

@@ -54,7 +54,8 @@ secondary_entities:
         unit: ppm
 
   - entity: button
-    translation_key: uv_sterilization
+    name: UV sterilization
+    icon: "mdi:lightbulb-fluorescent-tube"
     category: config
     dps:
       - id: 14