Bump markdown from 3.3.7 to 3.4.1

Bumps [markdown](https://github.com/Python-Markdown/markdown) from 3.3.7 to 3.4.1.
- [Release notes](https://github.com/Python-Markdown/markdown/releases)
- [Commits](https://github.com/Python-Markdown/markdown/compare/3.3.7...3.4.1)

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

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

requirements.txt

@@ -1,4 +1,4 @@
-markdown==3.3.7
+markdown==3.4.1
 feedgenerator==2.0.0
 jinja2==3.1.2
 pygments==2.12.0