Bump rouge from 3.26.0 to 3.26.1

Bumps [rouge](https://github.com/rouge-ruby/rouge) from 3.26.0 to 3.26.1.
- [Release notes](https://github.com/rouge-ruby/rouge/releases)
- [Changelog](https://github.com/rouge-ruby/rouge/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rouge-ruby/rouge/compare/v3.26.0...v3.26.1)