Bump markdown2 from 2.4.5 to 2.4.6 (#3139)

Bumps [markdown2](https://github.com/trentm/python-markdown2) from 2.4.5 to 2.4.6.
- [Release notes](https://github.com/trentm/python-markdown2/releases)
- [Changelog](https://github.com/trentm/python-markdown2/blob/master/CHANGES.md)
- [Commits](https://github.com/trentm/python-markdown2/compare/2.4.5...2.4.6)

---
updated-dependencies:
- dependency-name: markdown2
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

requirements.txt

@@ -4,7 +4,7 @@ boto3==1.24.91
 imbalanced-learn==0.9.1
 libmozdata==0.1.83
 lmdb==1.3.0
-markdown2==2.4.5
+markdown2==2.4.6
 matplotlib==3.6.1
 mercurial==6.2.3
 microannotate==0.0.24