Bump vuepress-plugin-md-enhance from 2.0.0-rc.10 to 2.0.0-rc.16 in /docs

Bumps [vuepress-plugin-md-enhance](https://github.com/vuepress-theme-hope/vuepress-theme-hope/tree/HEAD/packages/md-enhance) from 2.0.0-rc.10 to 2.0.0-rc.16.
- [Release notes](https://github.com/vuepress-theme-hope/vuepress-theme-hope/releases)
- [Changelog](https://github.com/vuepress-theme-hope/vuepress-theme-hope/blob/main/CHANGELOG.md)
- [Commits](https://github.com/vuepress-theme-hope/vuepress-theme-hope/commits/v2.0.0-rc.16/packages/md-enhance)

---
updated-dependencies:
- dependency-name: vuepress-plugin-md-enhance
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>