Use --reporter github-actions-logging option

[liamnichols]

👋 Nice Action!

I wasn't aware of it until after I was digging into the SwiftLint source code, but there is actually a reporter that formats for the GitHub Action so we can avoid having to sed stdout from now on 🚀

(The reporter wasn't documented in SwiftLint's Readme but I've added it here: realm/SwiftLint/pull/3223)

I ran this on my test project and it seems to work, but please feel free to give it a try yourself first 🙏

[liamnichols]

Ah, the tests seem to fail because the output is ordered in a different way... I'm not completely sure why though since I see something about sort in the yaml (although I'm not 100% sure if I follow it correctly).

Any suggestions would be helpful 🙏

[hervenivon]

In case you don't already know,

I had issues with this https://github.com/norio-nomura/action-swiftlint. @sinoru's version https://github.com/sinoru/actions-swiftlint solved most of them, and the code is clearly maintained.