Bump markdown from 3.8.1 to 3.8.2

Bumps [markdown](https://github.com/Python-Markdown/markdown) from 3.8.1 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@3.8.1...3.8.2)

---
updated-dependencies:
- dependency-name: markdown
  dependency-version: 3.8.2
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Author: dependabot[bot]