chore: prefer arrow function shorthand

src/checkbox-group/index.tsx

@@ -69,9 +69,7 @@ export default createComponent({
 
     watch(
       () => props.modelValue,
-      (value) => {
-        emit('change', value);
-      }
+      (value) => emit('change', value)
     );
 
     useExpose({ toggleAll });