Bump myst-parser from 1.0.0 to 2.0.0

Bumps [myst-parser](https://github.com/executablebooks/MyST-Parser) from 1.0.0 to 2.0.0.
- [Release notes](https://github.com/executablebooks/MyST-Parser/releases)
- [Changelog](https://github.com/executablebooks/MyST-Parser/blob/master/CHANGELOG.md)
- [Commits](executablebooks/MyST-Parser@v1.0.0...v2.0.0)

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

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

requirements/docs.txt

@@ -1,6 +1,6 @@
 -r docs-check.txt
 
-myst-parser==1.0.0
+myst-parser==2.0.0
 setuptools==67.8.0
 sphinx==6.2.1
 sphinx-rtd-theme==1.2.2