CI: (deps): Bump myst-parser from 2.0.0 to 3.0.0 in /ci

Bumps [myst-parser](https://github.com/executablebooks/MyST-Parser) from 2.0.0 to 3.0.0.
- [Release notes](https://github.com/executablebooks/MyST-Parser/releases)
- [Changelog](https://github.com/executablebooks/MyST-Parser/blob/master/CHANGELOG.md)
- [Commits](executablebooks/MyST-Parser@v2.0.0...v3.0.0)

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

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

ci/doc_requirements.txt

@@ -2,7 +2,7 @@ sphinx==7.3.7
 pydata-sphinx-theme==0.15.2
 sphinx-design==0.5.0
 sphinx-gallery==0.15.0
-myst-parser==2.0.0
+myst-parser==3.0.0
 netCDF4==1.6.5
 geopandas==0.14.3
 rtree==1.2.0