chore(deps): update pymdown-extensions requirement in /docs (#11)

Updates the requirements on [pymdown-extensions](https://github.com/facelessuser/pymdown-extensions) to permit the latest version.
- [Release notes](https://github.com/facelessuser/pymdown-extensions/releases)
- [Commits](facelessuser/pymdown-extensions@10.7...11.0.2)

---
updated-dependencies:
- dependency-name: pymdown-extensions
  dependency-version: 11.0.2
  dependency-type: direct:production
...

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

Author: dependabot[bot]

docs/requirements.txt

@@ -10,4 +10,4 @@
 
 mkdocs>=1.6
 mkdocs-material>=9.5
-pymdown-extensions>=10.7
+pymdown-extensions>=11.0.2