message: docs(ImagePreview): improve document
diff: @@ -138,12 +138,16 @@ export default {
  };
  ```
  -### Component Call use image slot
  +### Use image slot
  +
  +When using ImagePreview component, you can custom the image through the `image` slot, such as render a video content.
  ```html
  -<van-image-preview v-model:show="show" :images="images" @change="onChange">
  +<van-image-preview v-model:show="show" :images="images">
  <template #image="{ src }">
  - <video style="width: 100%;" controls><source :src="src" /></video>
  + <video style="width: 100%;" controls>
  + <source :src="src" />
  + </video>
  </template>
  </van-image-preview>
  ```
  @@ -154,21 +158,14 @@ import { ref } from 'vue';
  export default {
  setup() {
  const show = ref(false);
  - const index = ref(0);
  const images = [
  'https://www.w3school.com.cn/i/movie.ogg',
  'https://www.w3school.com.cn/i/movie.ogg',
  'https://www.w3school.com.cn/i/movie.ogg',
  ];
  - const onChange = (newIndex) => {
  - index.value = newIndex;
  - };
  -
  return {
  show,
  - index,
  images,
  - onChange,
  };
  },
  };
  @@ -282,7 +279,7 @@ imagePreviewRef.value?.swipeTo(1);
  | --- | --- | --- |
  | index | Custom index | { index: index of current image } |
  | cover | Custom content that covers the image preview | - |
  -| image | Custom image slot | { src: current image src } |
  +| image `v3.6.5` | Custom image content | { src: current image src } |
  ### onClose Parameters
  