chore(goreleaser): use .ReleaseNotes template variable in Slack announcement
Description
- chore(goreleaser): use .ReleaseNotes template variable in Slack announcement
Previously attempted to use .IsPrerelease and .Changelog.Groups which are not available in the Slack announcement template context. Updated to use .ReleaseNotes which contains the generated changelog after the changelog step executes.
Related Issues
Resolves #[issue_number]