message: docs(changelog): 4.0.0
diff: @@ -19,6 +19,21 @@ Vant follows [Semantic Versioning 2.0.0](https://semver.org/lang/zh-CN/).
  ## Details
  +### [v4.0.0](https://github.com/vant-ui/vant/compare/v4.0.0-rc.9...v4.0.0)
  +
  +`2022-11-26`
  +
  +**Feature**
  +
  +- List: add disabled prop [#11307](https://github.com/vant-ui/vant/issues/11307)
  +- BackTop: allow dynamically set target prop [#11311](https://github.com/vant-ui/vant/issues/11311)
  +- BackTop: allow using css var to custom position [#11312](https://github.com/vant-ui/vant/issues/11312)
  +- BackTop: rename visibility-height prop to offset [#11309](https://github.com/vant-ui/vant/issues/11309)
  +
  +**Bug Fixes**
  +
  +- Field: keep selection position after updating value [#11308](https://github.com/vant-ui/vant/issues/11308)
  +
  ### [v4.0.0-rc.9](https://github.com/vant-ui/vant/compare/v4.0.0-rc.8...v4.0.0-rc.9)
  `2022-11-24`
  