Update build for arm64/aarch64

[davidallendj]

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Fixes #(issue)

Type of Change

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[synackd]

Can we copy one of the Goreleaser build GitHub Actions workflows so that Goreleaser builds happen on PR pushes? Would be good to make sure it builds correctly before merge.

[synackd]

Checks are passing and I did a basic test. Let's merge this to ensure we have ARM builds.

[synackd]

Should mention that this addresses #7.