Found your article on 4sysops
It has a link to a sample autounattend.xml file at the end that is no longer valid for the repo.
Are you able to update it? If so, I'd use a permalink so reorganization of the repo in the future doesn't invalidate it.
Current version permalink is https://github.com/brandonleegit/PackerBuilds/blob/a3b90ada6cdbcb50a99c5b5ba2f19121c6880bb2/vmware-WindowsServer2022/setup/win22/autounattend.xml