Bump markdown from 3.3.6 to 3.3.7

Bumps [markdown](https://github.com/Python-Markdown/markdown) from 3.3.6 to 3.3.7.
- [Release notes](https://github.com/Python-Markdown/markdown/releases)
- [Commits](https://github.com/Python-Markdown/markdown/compare/3.3.6...3.3.7)

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

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

requirements.txt

@@ -12,7 +12,7 @@ bleach==4.1.0
 bleach-allowlist==1.0.3
 gunicorn==20.1.0
 lxml==4.8.0
-Markdown==3.3.6
+Markdown==3.3.7
 Pillow==9.0.1
 psycopg2-binary==2.9.3
 python-dotenv==0.20.0