message: docs(PickerGroup): fix missing tabs prop
diff: @@ -86,7 +86,11 @@ Place two `DatePicker` components in the default slot of `PickerGroup` to select
  @confirm="onConfirm"
  @cancel="onCancel"
  >
  - <van-date-picker v-model="startDate" :min-date="minDate" :max-date="maxDate" />
  + <van-date-picker
  + v-model="startDate"
  + :min-date="minDate"
  + :max-date="maxDate"
  + />
  <van-date-picker v-model="endDate" :min-date="minDate" :max-date="maxDate" />
  </van-picker-group>
  ```
  @@ -162,7 +166,8 @@ export default {
  ### Props
  | Attribute | Description | Type | Default |
  -| ------------------- | ---------------------- | -------- | --------- |
  +| ------------------- | ---------------------- | ---------- | --------- |
  +| tabs | Titles of tabs | _string[]_ | `[]` |
  | title | Toolbar title | _string_ | `''` |
  | confirm-button-text | Text of confirm button | _string_ | `Confirm` |
  | cancel-button-text | Text of cancel button | _string_ | `Cancel` |
  