Bump myst-parser from 0.17.2 to 0.18.0

Bumps [myst-parser](https://github.com/executablebooks/MyST-Parser) from 0.17.2 to 0.18.0.
- [Release notes](https://github.com/executablebooks/MyST-Parser/releases)
- [Changelog](https://github.com/executablebooks/MyST-Parser/blob/master/CHANGELOG.md)
- [Commits](executablebooks/MyST-Parser@v0.17.2...v0.18.0)

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

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

docs/requirements.txt

@@ -1,5 +1,5 @@
 furo==2022.6.4.1
 sphinx==5.0.1
 sphinx-click==4.1.0
-myst_parser==0.17.2
+myst_parser==0.18.0
 linkify-it-py == 2.0.0