The script at https://gh.io/copilot-install thinks that FreeBSD is Windows

[yurivict]

$ curl -fsSL https://gh.io/copilot-install | bash
Installing GitHub Copilot CLI...
Error: Windows detected but winget not found. Please see https://gh.io/install-copilot-readme

copilot-install obviously has a bug and it assumes that after checking for Linux, Android and iOS/Darwin only Windows is left. In fact it should run uname and determine what system is this.

Please fix this bug.
Please also support FreeBSD.