fix(checkbox): change trigger form validation. (#6741)

Author: kovsu

components/checkbox/Checkbox.tsx

@@ -63,6 +63,7 @@ export default defineComponent({
       const targetChecked = event.target.checked;
       emit('update:checked', targetChecked);
       emit('change', event);
+      formItemContext.onFieldChange();
     };
     const checkboxRef = ref();
     const focus = () => {