dependabot: bump pymdown-extensions from 10.8 to 10.8.1

Bumps [pymdown-extensions](https://github.com/facelessuser/pymdown-extensions) from 10.8 to 10.8.1.
- [Release notes](https://github.com/facelessuser/pymdown-extensions/releases)
- [Commits](facelessuser/pymdown-extensions@10.8...10.8.1)

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

Signed-off-by: dependabot[bot] <[email protected]>

requirements.txt

@@ -5,4 +5,4 @@ mkdocs-material==9.5.18
 mkdocs-material-extensions==1.3
 mkdocs-minify-plugin==0.8.0
 pygments==2.16.1
-pymdown-extensions==10.8
+pymdown-extensions==10.8.1