Bump markdown from 3.3.6 to 3.7

Bumps [markdown](https://github.com/Python-Markdown/markdown) from 3.3.6 to 3.7.
- [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@3.3.6...3.7)

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

Signed-off-by: dependabot[bot] <[email protected]>

requirements.txt

@@ -21,7 +21,7 @@ sphinxcontrib.datatemplates==0.9.1
 meetup-api==0.1.1
 urllib3[secure]==2.2.3
 yamale==4.0.4
-markdown==3.3.6
+markdown==3.7
 ruamel.yaml==0.17.21
 lxml==4.8.0
 # For emoji