Automatically generate release notes for github release

Description of the feature request

Enhancement to GitHub - bitrise-steplib/steps-github-release
Github recently introduced a new way how to automatically generate release notes Automatically generated release notes - GitHub Docs. I also checked the api and there is a parameter called generate_release_notes that should be responsible for it!
It would be cool if we can use this api and directly generate release notes instead of generating it separately and passing to this step.

Use case / for what or how I would use it

This will help us to reduce the number of steps by removing generate-changelog step, which also has a bug Early commits are missing from the generated Changelog · Issue #12 · bitrise-steplib/steps-generate-changelog · GitHub. Because of this issue we generate release notes manually almost after every release.