message: docs(DropdownMenu): fix demo state
diff: @@ -23,20 +23,18 @@ app.use(DropdownItem);
  ```html
  <van-dropdown-menu>
  - <van-dropdown-item v-model="state.value1" :options="option1" />
  - <van-dropdown-item v-model="state.value2" :options="option2" />
  + <van-dropdown-item v-model="value1" :options="option1" />
  + <van-dropdown-item v-model="value2" :options="option2" />
  </van-dropdown-menu>
  ```
  ```js
  -import { reactive } from 'vue';
  +import { ref } from 'vue';
  export default {
  setup() {
  - const state = reactive({
  - value1: 0,
  - value2: 'a',
  - });
  + const value1 = ref(0);
  + const value2 = ref('a');
  const option1 = [
  { text: 'Option1', value: 0 },
  { text: 'Option2', value: 1 },
  @@ -49,7 +47,8 @@ export default {
  ];
  return {
  - state,
  + value1,
  + value2,
  option1,
  option2,
  };
  @@ -61,16 +60,16 @@ export default {
  ```html
  <van-dropdown-menu>
  - <van-dropdown-item v-model="state.value" :options="option" />
  + <van-dropdown-item v-model="value" :options="option" />
  <van-dropdown-item title="Title" ref="item">
  <van-cell center title="Title">
  <template #right-icon>
  - <van-switch v-model="state.switch1" size="24" active-color="#ee0a24" />
  + <van-switch v-model="switch1" size="24" active-color="#ee0a24" />
  </template>
  </van-cell>
  <van-cell center title="Title">
  <template #right-icon>
  - <van-switch v-model="state.switch2" size="24" active-color="#ee0a24" />
  + <van-switch v-model="switch2" size="24" active-color="#ee0a24" />
  </template>
  </van-cell>
  <div style="padding: 5px 16px;">
  @@ -83,16 +82,14 @@ export default {
  ```
  ```js
  -import { ref, reactive } from 'vue';
  +import { ref } from 'vue';
  export default {
  setup() {
  const item = ref(null);
  - const state = reactive({
  - value: 0,
  - switch1: false,
  - switch2: false,
  - });
  + const value = ref(0);
  + const switch1 = ref(false);
  + const switch2 = ref(false);
  const options = [
  { text: 'Option1', value: 0 },
  { text: 'Option2', value: 1 },
  @@ -104,7 +101,9 @@ export default {
  return {
  item,
  - state,
  + value,
  + switch1,
  + switch2,
  options,
  onConfirm,
  };
  