perkeep: migrate to go

[iMichka]

• Have you followed the guidelines for contributing?
• Have you ensured that your commits follow the commit style guide?
• Have you checked that there aren't other open pull requests for the same formula update/change?
• Have you built your formula locally with brew install --build-from-source <formula>, where <formula> is the name of the formula you're submitting?
• Is your test running fine brew test <formula>, where <formula> is the name of the formula you're submitting?
• Does your build pass brew audit --strict <formula> (after doing brew install --build-from-source <formula>)? If this is a new formula, does it pass brew audit --new <formula>?

---

[iMichka]

Fixed by #95964

[Bo98]

Oops didn't even notice there was a PR open, let alone was related to the Go PR. I was just going through versioned formulae to deprecate and saw a cheeky go@1.12 that didn't exist 😅

[iMichka]

It's ok. I opened a bunch of fixes for the go PR, did not have time to fix the remaining ones. Thanks for taking care of this one.