Bump pymdown-extensions from 9.6 to 9.7

Bumps [pymdown-extensions](https://github.com/facelessuser/pymdown-extensions) from 9.6 to 9.7.
- [Release notes](https://github.com/facelessuser/pymdown-extensions/releases)
- [Commits](https://github.com/facelessuser/pymdown-extensions/compare/9.6...9.7)

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

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

docs/requirements-docs.txt

@@ -2,5 +2,5 @@ markdown==3.3.7
 mkdocs==1.4.1
 mkdocs-material==8.5.7
 mdx_truly_sane_lists==1.3
-pymdown-extensions==9.6
+pymdown-extensions==9.7
 jinja2==3.1.2