chore(deps): bump markdown from 3.5.2 to 3.6 in /hack/api-docs (#3275)

Bumps [markdown](https://github.com/Python-Markdown/markdown) from 3.5.2 to 3.6.
- [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/3.5.2...3.6)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

hack/api-docs/requirements.txt

@@ -12,7 +12,7 @@ importlib-resources==6.1.3
 Jinja2==3.1.3
 jsmin==3.0.1
 livereload==2.6.3
-Markdown==3.5.2
+Markdown==3.6
 MarkupSafe==2.1.5
 mergedeep==1.3.4
 mike @ git+https://github.com/jimporter/mike@300593c338b18f61f604d18457c351e166318020