install ketch CLI on apple m1 machines

[vivek]

This simple fix enables ketch installation on apple m1 machines. I tested, it works well as apple m1 allows running darwin-amd64 binaries via rosetta2 automatically.

Description

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Fixes # (issue)

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• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Chore (documentation addition or typo, file relocation)

Testing

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• This change requires no testing (i.e. documentation update)

Documentation

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Final Checklist:

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• My changes generate no new warnings

Additional Information (omit if empty)

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