[stubsabot] Bump Markdown to 3.10.*

Release: https://pypi.org/pypi/Markdown/3.10
Homepage: https://Python-Markdown.github.io/
Repository: https://github.com/Python-Markdown/markdown
Typeshed stubs: https://github.com/python/typeshed/tree/main/stubs/Markdown
Changelog: https://python-markdown.github.io/changelog/
Diff: Python-Markdown/markdown@3.9.0...3.10.0

Stubsabot analysis of the diff between the two releases:
 - 0 public Python files have been added.
 - 0 files included in typeshed's stubs have been deleted.
 - 3 files included in typeshed's stubs have been modified or renamed: `markdown/__meta__.py`, `markdown/extensions/footnotes.py`, `markdown/htmlparser.py`.
 - Total lines of Python code added: 44.
 - Total lines of Python code deleted: 6.

If stubtest fails for this PR:
- Leave this PR open (as a reminder, and to prevent stubsabot from opening another PR)
- Fix stubtest failures in another PR, then close this PR

Note that you will need to close and re-open the PR in order to trigger CI

Author: stubsabot

stubs/Markdown/METADATA.toml

@@ -1,2 +1,2 @@
-version = "3.9.*"
+version = "3.10.*"
 upstream_repository = "https://github.com/Python-Markdown/markdown"