Bump markdown2 from 2.4.10 to 2.4.11

Bumps [markdown2](https://github.com/trentm/python-markdown2) from 2.4.10 to 2.4.11.
- [Changelog](https://github.com/trentm/python-markdown2/blob/master/CHANGES.md)
- [Commits](trentm/python-markdown2@2.4.10...2.4.11)

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

Signed-off-by: dependabot[bot] <support@github.com>

requirements.txt

@@ -14,7 +14,7 @@ ffmpeg-python==0.2.0
 future==0.18.3
 git+https://github.com/python-telegram-bot/ptbcontrib.git
 gitpython==3.1.40
-markdown2==2.4.10
+markdown2==2.4.11
 multicolorcaptcha==1.2.0
 pillow==9.4.0
 psutil==5.9.4