Update markdown to 3.2.2

[pyup-bot]

This PR updates Markdown from 3.2.1 to 3.2.2.

The bot wasn't able to find a changelog for this release. Got an idea?

Links

• PyPI: https://pypi.org/project/markdown
• Repo: https://Python-Markdown.github.io/

[codecov]

Codecov Report

Merging #1652 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1652   +/-   ##
=======================================
  Coverage   76.38%   76.38%           
=======================================
  Files         119      119           
  Lines        4357     4357           
  Branches      498      498           
=======================================
  Hits         3328     3328           
  Misses        866      866           
  Partials      163      163           

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