Bump myst-parser from 0.17.2 to 3.0.1

Bumps [myst-parser](https://github.com/executablebooks/MyST-Parser) from 0.17.2 to 3.0.1.
- [Release notes](https://github.com/executablebooks/MyST-Parser/releases)
- [Changelog](https://github.com/executablebooks/MyST-Parser/blob/master/CHANGELOG.md)
- [Commits](executablebooks/MyST-Parser@v0.17.2...v3.0.1)

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

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

Author: dependabot[bot]

Diff for: requirements.txt

@@ -4,7 +4,7 @@ Sphinx==4.5.0
 sphinx_autobuild==2021.3.14
 
 # Markdown support
-myst-parser==0.17.2
+myst-parser==3.0.1
 
 # Blogging
 ablog==0.10.6  # pyup: ignore