Bump pymdown-extensions from 8.2 to 10.16.1

Bumps [pymdown-extensions](https://github.com/facelessuser/pymdown-extensions) from 8.2 to 10.16.1.
- [Release notes](https://github.com/facelessuser/pymdown-extensions/releases)
- [Commits](facelessuser/pymdown-extensions@8.2...10.16.1)

---
updated-dependencies:
- dependency-name: pymdown-extensions
  dependency-version: 10.16.1
  dependency-type: direct:development
...

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

Author: dependabot[bot]

requirements-dev.txt

@@ -1,5 +1,5 @@
 pygments
-pymdown-extensions==8.2
+pymdown-extensions==10.16.1
 cython>=0.28.5
 twine
 mkdocs==1.2.3