Bump rubocop from 0.63.0 to 0.63.1 in /Library/Homebrew/test

Bumps [rubocop](https://github.com/rubocop-hq/rubocop) from 0.63.0 to 0.63.1.
- [Release notes](https://github.com/rubocop-hq/rubocop/releases)
- [Changelog](https://github.com/rubocop-hq/rubocop/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rubocop-hq/rubocop/compare/v0.63.0...v0.63.1

)

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