Build(deps-dev): bump myst-parser from 3.0.1 to 4.0.1

Bumps [myst-parser](https://github.com/executablebooks/MyST-Parser) from 3.0.1 to 4.0.1.
- [Release notes](https://github.com/executablebooks/MyST-Parser/releases)
- [Changelog](https://github.com/executablebooks/MyST-Parser/blob/master/CHANGELOG.md)
- [Commits](executablebooks/MyST-Parser@v3.0.1...v4.0.1)

---
updated-dependencies:
- dependency-name: myst-parser
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]