Bump pymdown-extensions from 9.2 to 9.3 (#290)

Bumps [pymdown-extensions](https://github.com/facelessuser/pymdown-extensions) from 9.2 to 9.3.
- [Release notes](https://github.com/facelessuser/pymdown-extensions/releases)
- [Commits](facelessuser/pymdown-extensions@9.2...9.3)

---
updated-dependencies:
- dependency-name: pymdown-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>

requirements.txt

@@ -7,4 +7,4 @@ mkdocs==1.2.3
 mkdocstrings==0.18.1
 pip-upgrader==1.4.15
 pydocstyle==6.1.1
-pymdown-extensions==9.2
+pymdown-extensions==9.3