message: docs(Calendar): add vertion tip
diff: @@ -16,8 +16,8 @@ Vant follows [Semantic Versioning 2.0.0](https://semver.org/lang/zh-CN/).
  **Feature**
  +- Calendar: add first-day-of-week prop [#6468](https://github.com/youzan/vant/issues/6468)
  - DatetimePicker: add columns-order prop [#6672](https://github.com/youzan/vant/issues/6672) [#6768](https://github.com/youzan/vant/issues/6768)
  -- Calendar: add firstDayOfWeek prop [#6468](https://github.com/youzan/vant/issues/6468)
  **Bug Fixes**
  