build(deps): bump markdown-it-py from 3.0.0 to 4.0.0

Bumps [markdown-it-py](https://github.com/executablebooks/markdown-it-py) from 3.0.0 to 4.0.0.
- [Release notes](https://github.com/executablebooks/markdown-it-py/releases)
- [Changelog](https://github.com/executablebooks/markdown-it-py/blob/master/CHANGELOG.md)
- [Commits](https://github.com/executablebooks/markdown-it-py/compare/v3.0.0...v4.0.0)

---
updated-dependencies:
- dependency-name: markdown-it-py
  dependency-version: 4.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

requirements.txt

@@ -5,7 +5,7 @@ matplotlib==3.10.6
 fastapi[standard]==0.115.14
 python-fasthtml==0.12.29
 MonsterUI==1.0.29
-markdown-it-py==3.0.0
+markdown-it-py==4.0.0
 mdit-py-plugins==0.5.0
 bokeh==3.8.0
 uvicorn==0.36.0