There is a new pull request by pbui against master on the void-packages repository

https://github.com/pbui/void-packages python-Markdown
https://github.com/void-linux/void-packages/pull/14208

python-Markdown: update to 3.1.1.
Adopt package.

A patch file from https://github.com/void-linux/void-packages/pull/14208.patch is attached