build(deps): Bump pymdown-extensions from 9.9 to 10.3

Bumps [pymdown-extensions](https://github.com/facelessuser/pymdown-extensions) from 9.9 to 10.3.
- [Release notes](https://github.com/facelessuser/pymdown-extensions/releases)
- [Commits](facelessuser/pymdown-extensions@9.9...10.3)

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

Signed-off-by: dependabot[bot] <support@github.com>

requirements.txt

@@ -33,7 +33,7 @@ platformdirs==2.6.2
 pluggy==1.0.0
 pre-commit==2.20.0
 Pygments==2.15.1
-pymdown-extensions==9.9
+pymdown-extensions==10.3
 pyparsing==3.0.9
 pytest==7.3.1
 pytest-cov==4.1.0