Thanks for the heads up. I just checked the site through several browsers and proxying through a VPN. There's no typo and it properly links to:

https://github.com/Tongyi-MAI/Z-Image

Screenshot of site with network tools open to indicate link

https://imgur.com/a/FZDz0K2

EDIT: It's possible that this issue might have existed in an old cached version. I'll purge the cache just to make sure.