Bump markdown-it-py from 2.0.1 to 2.1.0

Bumps [markdown-it-py](https://github.com/executablebooks/markdown-it-py) from 2.0.1 to 2.1.0.
- [Release notes](https://github.com/executablebooks/markdown-it-py/releases)
- [Changelog](https://github.com/executablebooks/markdown-it-py/blob/master/CHANGELOG.md)
- [Commits](https://github.com/executablebooks/markdown-it-py/compare/v2.0.1...v2.1.0

)

---
updated-dependencies:
- dependency-name: markdown-it-py
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>