fix(shorebird_cli): wrap ∞ in lightCyan to fix usage command test

[bryanoltman]

Description

Not sure why this was only failing when running dart test from the terminal (and not in vscode or in CI), but this fixes the dart test failure.

Type of Change

• ✨ New feature (non-breaking change which adds functionality)
• 🛠️ Bug fix (non-breaking change which fixes an issue)
• ❌ Breaking change (fix or feature that would cause existing functionality to change)
• 🧹 Code refactor
• ✅ Build configuration change
• 📝 Documentation
• 🗑️ Chore

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (4763704) 100.00% compared to head (54946b6) 100.00%.

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #772   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           72        72           
  Lines         2546      2546           
=========================================
  Hits          2546      2546           

☔ View full report in Codecov by Sentry.
📢 Do you have feedback about the report comment? Let us know in this issue.