Bump markdown-it-py from 2.1.0 to 2.2.0

Bumps [markdown-it-py](https://github.com/executablebooks/markdown-it-py) from 2.1.0 to 2.2.0.
- [Release notes](https://github.com/executablebooks/markdown-it-py/releases)
- [Changelog](https://github.com/executablebooks/markdown-it-py/blob/master/CHANGELOG.md)
- [Commits](executablebooks/markdown-it-py@v2.1.0...v2.2.0)

---
updated-dependencies:
- dependency-name: markdown-it-py
  dependency-type: indirect
...

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