cask/audit: skip livecheck requirement for :latest #24297

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  audit_latest_with_livecheck forbids a livecheck block in casks using version :latest, so audit_livecheck_required could never be satisfied by them, e.g. font-baekmuk in Homebrew/homebrew-cask#295296.

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Claude with Opus 5.5 at High effort, with local review and testing.

Summary by CodeRabbit

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  Bug Fixes
  
  
  • Casks configured to track the latest version are no longer flagged by the required-livecheck audit. Other existing checks for new casks, official taps and shared audit issues remain unchanged, so the adjustment applies specifically to casks using the latest-version setting. This prevents an unnecessary audit issue for those casks.