Bump pymdown-extensions from 10.9 to 10.12

Bumps [pymdown-extensions](https://github.com/facelessuser/pymdown-extensions) from 10.9 to 10.12.
- [Release notes](https://github.com/facelessuser/pymdown-extensions/releases)
- [Commits](facelessuser/pymdown-extensions@10.9...10.12)

---
updated-dependencies:
- dependency-name: pymdown-extensions
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

doc-requirements.txt

@@ -2,4 +2,4 @@ mkdocs==1.6.1
 mkdocs-material==9.5.33
 mkdocs-material-extensions~=1.3
 pygments==2.18.0
-pymdown-extensions==10.9
+pymdown-extensions==10.12