Bump markdown from 3.8 to 3.8.2 (#5266)

Bumps [markdown](https://github.com/Python-Markdown/markdown) from 3.8 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](https://github.com/Python-Markdown/markdown/compare/3.8...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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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

pyproject.toml

@@ -64,7 +64,7 @@ dependencies = [
   "kombu==5.5.*",
   "libsass==0.23.*",
   "lxml",
-  "markdown==3.8",  # 3.3.5 requires importlib-metadata>=4.4, but django-bootstrap3 requires importlib-metadata<3.
+  "markdown==3.8.2",  # 3.3.5 requires importlib-metadata>=4.4, but django-bootstrap3 requires importlib-metadata<3.
   # We can upgrade markdown again once django-bootstrap3 upgrades or once we drop Python 3.6 and 3.7
   "mt-940==4.30.*",
   "oauthlib==3.3.*",