Bump haml from 5.0.3 to 5.0.4
Bump haml from 5.0.3 to 5.0.4

Bumps [haml](https://github.com/haml/haml) from 5.0.3 to 5.0.4.
- [Changelog](https://github.com/haml/haml/blob/master/CHANGELOG.md)
- [Commits](https://github.com/haml/haml/compare/v5.0.3...v5.0.4)
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