Bump mdformat-frontmatter

Bumps the development-dependencies group with 1 update in the / directory: [mdformat-frontmatter](https://github.com/butler54/mdformat-frontmatter).


Updates `mdformat-frontmatter` from 0.4.1 to 2.0.8
- [Release notes](https://github.com/butler54/mdformat-frontmatter/releases)
- [Changelog](https://github.com/butler54/mdformat-frontmatter/blob/main/CHANGELOG.md)
- [Commits](butler54/mdformat-frontmatter@v0.4.1...v2.0.8)

---
updated-dependencies:
- dependency-name: mdformat-frontmatter
  dependency-type: direct:development
  update-type: version-update:semver-major
  dependency-group: development-dependencies
...

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

pyproject.toml

@@ -65,7 +65,7 @@ jupyterlab-myst = "^2.4.2"
 jupytext = "^1.16.2"
 matplotlib = "^3.5.2"
 mdformat = "^0.7.14"
-mdformat_frontmatter = "^0.4.1"
+mdformat_frontmatter = ">=0.4.1,<2.1.0"
 mdformat_tables = ">=0.4.1,<1.1.0"
 mypy = "^1.5.1"
 pre-commit = ">=3,<5"