fix: update knx doc

[youlie1]

Description

Checklist

• [ ] the pull request title describes what this PR does (not a vague title like Update readme.md)
• [ ] the pull request targets the default branch of the repository (develop)
• [ ] the code follows the established code style of the repository, such as:
  • npm run prettier:check passes
  • npm run eslint:check passes
• [ ] tests are added for the changes I made (if any source code was modified)
• [ ] documentation added or updated
• [ ] I have run the project locally and verified that there are no errors

Fixes

fixes #[issue number], fixes #[issue number]

[qq798280904]

我是陈锦祥，已收到你的邮件，谢谢。