🌱 Bump mkdocs-material-extensions from 1.1.1 to 1.3.1 (#588)

Bumps [mkdocs-material-extensions](https://github.com/facelessuser/mkdocs-material-extensions) from 1.1.1 to 1.3.1.
- [Release notes](https://github.com/facelessuser/mkdocs-material-extensions/releases)
- [Changelog](https://github.com/facelessuser/mkdocs-material-extensions/blob/master/changelog.md)
- [Commits](facelessuser/mkdocs-material-extensions@1.1.1...1.3.1)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

docs/requirements.txt

@@ -15,7 +15,7 @@ MarkupSafe==2.1.3
 mergedeep==1.3.4
 mkdocs==1.5.2
 mkdocs-material==9.2.3
-mkdocs-material-extensions==1.1.1
+mkdocs-material-extensions==1.3.1
 packaging==23.1
 paginate==0.5.6
 pathspec==0.11.2