Bump pymdown-extensions from 6.1 to 10.0

Bumps [pymdown-extensions](https://github.com/facelessuser/pymdown-extensions) from 6.1 to 10.0.
- [Release notes](https://github.com/facelessuser/pymdown-extensions/releases)
- [Commits](facelessuser/pymdown-extensions@6.1.0...10.0)

---
updated-dependencies:
- dependency-name: pymdown-extensions
  dependency-type: direct:production
...

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

Author: dependabot[bot]

requirements.txt

@@ -4,4 +4,4 @@ mkdocs-material==4.4.2
 
 # markdown extensions
 mdx-gh-links==0.2
-pymdown-extensions==6.1
+pymdown-extensions==10.0