Update myst-parser requirement from <3,>=2 to >=2,<5

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...v4.0.0)

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

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

pyproject.toml

@@ -68,7 +68,7 @@ dev = [
 doc = [
     "Sphinx>=7.0.1,<9",
     "docutils==0.20.1",
-    "myst-parser>=2,<3",
+    "myst-parser>=2,<5",
 ]
 
 [project.urls]