Bump markdown from 3.9 to 3.10

Bumps [markdown](https://github.com/Python-Markdown/markdown) from 3.9 to 3.10.
- [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@3.9.0...3.10.0)

---
updated-dependencies:
- dependency-name: markdown
  dependency-version: '3.10'
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

test_reqs.txt

@@ -1,4 +1,4 @@
-Markdown==3.9  # pyup: <3.2
+Markdown==3.10  # pyup: <3.2
 coverage==7.11.0
 importlib_metadata<8.8
 typing_extensions==4.15.0