Bumps [pymdown-extensions](https://github.com/facelessuser/pymdown-extensions) from 10.21.2 to 10.21.3. - [Release notes](https://github.com/facelessuser/pymdown-extensions/releases) - [Commits](https://github.com/facelessuser/pymdown-extensions/compare/10.21.2...10.21.3) --- updated-dependencies: - dependency-name: pymdown-extensions dependency-version: 10.21.3 dependency-type: direct:production ... Signed-off-by: dependabot[bot] <support@github.com>