Bump commonmarker from 0.23.4 to 0.23.6 in /docs

Bumps [commonmarker](https://github.com/gjtorikian/commonmarker) from 0.23.4 to 0.23.6.
- [Release notes](https://github.com/gjtorikian/commonmarker/releases)
- [Changelog](https://github.com/gjtorikian/commonmarker/blob/main/CHANGELOG.md)
- [Commits](https://github.com/gjtorikian/commonmarker/compare/v0.23.4...v0.23.6

)

---
updated-dependencies:
- dependency-name: commonmarker
  dependency-type: indirect
...

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