misc/crush: Update to 0.18.1

Changelog:

• https://github.com/charmbracelet/crush/releases/tag/v0.16.0
• https://github.com/charmbracelet/crush/releases/tag/v0.16.1
• https://github.com/charmbracelet/crush/releases/tag/v0.17.0
• https://github.com/charmbracelet/crush/releases/tag/v0.18.0
• https://github.com/charmbracelet/crush/releases/tag/v0.18.1

Reported by: GitHub (watch releases)