message: docs(infinity): add Promise Polyfill tip
diff: @@ -49,8 +49,10 @@ new BScroll('.bs-wrapper', {
  })
  ```
  -::: danger
  +::: danger Note
  `fetch`, `render`, `createTombstone` must be implemented in accordance with the comments as above, otherwise an internal error will be reported.
  +
  +The plugin relies on Promise internally. If the browser does not support it, the Promise Polyfill is required.
  :::
  ## Demo
  