build(deps): bump markdown2 from 2.4.12 to 2.5.4

Bumps [markdown2](https://github.com/trentm/python-markdown2) from 2.4.12 to 2.5.4.
- [Changelog](https://github.com/trentm/python-markdown2/blob/master/CHANGES.md)
- [Commits](trentm/python-markdown2@2.4.12...2.5.4)

---
updated-dependencies:
- dependency-name: markdown2
  dependency-version: 2.5.4
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

requirements.txt

@@ -14,7 +14,7 @@ python-dateutil==2.9.0
 jieba==0.42.1
 whitenoise==6.6.0
 slowapi==0.1.9
-markdown2==2.4.12
+markdown2==2.5.4
 asgiref==3.8.1
 requests==2.32.3
 beautifulsoup4==4.12.3