Bump mkdocs-material-extensions from 1.0.3 to 1.3.1

Bumps [mkdocs-material-extensions](https://github.com/facelessuser/mkdocs-material-extensions) from 1.0.3 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@1.0.3...1.3.1)

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

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

requirements-dev.txt

@@ -1,5 +1,5 @@
 mkdocs-autorefs==0.3.0
-mkdocs-material-extensions==1.0.3
+mkdocs-material-extensions==1.3.1
 mkdocs-material==8.0.1
 mkdocs==1.2.3
 mkdocstrings==0.16.2