missing `Hardware::CPU.arm` for macos in siren formula

[smarchone]

On mac with m1 chips (arm),
brew install odpf/taps/optimus causes below error

Error: Invalid formula: /opt/homebrew/Library/Taps/odpf/homebrew-taps/Formula/siren.rb
formulae require at least a URL

[rohilsurana]

@SaikumarChintada moved the issue to main source repo as the homebrew formulas are published from here.