build(deps): bump the docs group in /docs with 2 updates

Bumps the docs group in /docs with 2 updates: [pymdown-extensions](https://github.com/facelessuser/pymdown-extensions) and [mkdocs-material](https://github.com/squidfunk/mkdocs-material).


Updates `pymdown-extensions` from 10.8.1 to 10.9
- [Release notes](https://github.com/facelessuser/pymdown-extensions/releases)
- [Commits](facelessuser/pymdown-extensions@10.8.1...10.9)

Updates `mkdocs-material` from 9.5.27 to 9.5.31
- [Release notes](https://github.com/squidfunk/mkdocs-material/releases)
- [Changelog](https://github.com/squidfunk/mkdocs-material/blob/master/CHANGELOG)
- [Commits](squidfunk/mkdocs-material@9.5.27...9.5.31)

---
updated-dependencies:
- dependency-name: pymdown-extensions
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: docs
- dependency-name: mkdocs-material
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: docs
...

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

Author: dependabot[bot]