build(deps): bump pug-code-gen from 2.0.1 to 2.0.3 in /docs

Bumps [pug-code-gen](https://github.com/pugjs/pug) from 2.0.1 to 2.0.3.
- [Release notes](https://github.com/pugjs/pug/releases)
- [Commits](https://github.com/pugjs/pug/compare/pug-code-gen@2.0.1...pug@2.0.3)

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