⬆️ 🤖 Dependencies: Update myst-parser requirement

Updates the requirements on [myst-parser](https://github.com/executablebooks/MyST-Parser) to permit the latest version.
- [Release notes](https://github.com/executablebooks/MyST-Parser/releases)
- [Changelog](https://github.com/executablebooks/MyST-Parser/blob/master/CHANGELOG.md)
- [Commits](executablebooks/MyST-Parser@v2.0.0...v3.0.1)

---
updated-dependencies:
- dependency-name: myst-parser
  dependency-type: direct:development
...

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

pyproject.toml

@@ -129,7 +129,7 @@ pydata-sphinx-theme = "^0.14.0"
 sphinx-hoverxref = "^1.3.0"
 sphinx-notfound-page = "^1.0.0rc1"
 sphinx_copybutton = "0.5.2"
-myst_parser = "^2.0.0"
+myst_parser = ">=2,<4"
 sphinx_design = "^0.5.0"
 
 [tool.pytest.ini_options]