Bump markdown from 3.5 to 3.8.2

Bumps [markdown](https://github.com/Python-Markdown/markdown) from 3.5 to 3.8.2.
- [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@3.5...3.8.2)

---
updated-dependencies:
- dependency-name: markdown
  dependency-version: 3.8.2
  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 @@ beautifulsoup4==4.12.3
 email-validator==2.1.1
 feedparser==6.0.11
 itsdangerous==2.2.0
-markdown==3.5
+markdown==3.8.2
 requests==2.32.3
 Flask-Session2==1.3.1
 pymongo==4.8.0