[fix] Chinese documentation redirect to a third-party page
## Describe the bug

**Description:** koajs.cn redirect to a third-party page

## Actual behavior

redirect to a third-party page

## Expected behavior

show Chinese documentation

## Checklist

- [x] I have searched through GitHub issues for similar issues.
- [x] I have completely read through the README and documentation.
- [x] I have tested my code with the latest version of Node.js and this package and confirmed it is still not working.
