Bump markdown from 3.3.4 to 3.4.1

Bumps [markdown](https://github.com/Python-Markdown/markdown) from 3.3.4 to 3.4.1.
- [Release notes](https://github.com/Python-Markdown/markdown/releases)
- [Commits](Python-Markdown/markdown@3.3.4...3.4.1)

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

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Author: dependabot[bot]