Update haml-lint to v0.40.1

This update speeds up HAML linting times by re-using the
`Rubocop::CLI` instance: https://github.com/sds/haml-lint/pull/329

Full changes:
https://github.com/sds/haml-lint/blob/main/CHANGELOG.md

Diff: https://my.diffend.io/gems/haml_lint/0.36.0/0.40.1

Changelog: changed