feat: Support macOS arm64
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Summary
This PR adds support for darwin/macOS arm64 users. Closes #74 and maybe others.
Description
I tried cross-compiling kubectl-flame with goreleaser on my M1 Mac, but got a compilation error for the darwin-arm64 binary:

With x/sys bumped it now compiles just fine for darwin-arm64 as well:

Which means that the goreleaser GHA action will be able to build & release for that target arch as well, so the .krew.yaml can be updated with the new platform support.
This works on my machine™
TYVM
Hi @edeNFed! Could you review this?
Dear yahoo, any chances to merge it and realease? Or should we drive our forks and release processes to have it?
I second this. An ARM64 version would be nice.