unzip: Update to 6.0-28

[miticollo]

This PR updates unzip to 6.0-28.

Checklist

• [X] Have you made sure there aren't any other open Pull Requests for the same update/change?
• [X] This Pull Request doesn't contain any package additions; it's a small change (e.g README change)
• [X] Have you confirmed this builds & works as intended on an iOS device (if applicable)?
• [ ] Have you confirmed this builds & works as intended on a macOS device (if applicable)?