Bump markdown from 3.9 to 3.10

Bumps [markdown](https://github.com/Python-Markdown/markdown) from 3.9 to 3.10.
- [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@3.9.0...3.10.0)

---
updated-dependencies:
- dependency-name: markdown
  dependency-version: '3.10'
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

requirements.txt

@@ -7,7 +7,7 @@ django-import-export==4.3.14
 djangorestframework==3.16.1
 gunicorn==23.0.0
 importlib-metadata==8.7.0
-Markdown==3.9
+Markdown==3.10
 python-dotenv==1.2.1
 pytz==2025.2
 six==1.17.0