Bump markdown2 from 2.4.7 to 2.4.8 (#3285)

Bumps [markdown2](https://github.com/trentm/python-markdown2) from 2.4.7 to 2.4.8.
- [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/2.4.7...2.4.8)

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

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==1.26.69
 imbalanced-learn==0.10.1
 libmozdata==0.1.83
 lmdb==1.4.0
-markdown2==2.4.7
+markdown2==2.4.8
 matplotlib==3.6.3
 mercurial==6.3.2
 microannotate==0.0.24