Bump markdown from 3.4.3 to 3.7

Bumps [markdown](https://github.com/Python-Markdown/markdown) from 3.4.3 to 3.7.
- [Release notes](https://github.com/Python-Markdown/markdown/releases)
- [Changelog](https://github.com/Python-Markdown/markdown/blob/master/docs/changelog.md)
- [Commits](Python-Markdown/markdown@3.4.3...3.7)

---
updated-dependencies:
- dependency-name: markdown
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

docs/requirements.txt

@@ -9,7 +9,7 @@ idna==3.6
 imagesize==1.4.1
 importlib-metadata==6.7.0
 Jinja2==3.1.3
-Markdown==3.4.3
+Markdown==3.7
 MarkupSafe==2.1.3
 nbsphinx
 packaging==23.2