If a file owned by a package changes (or has been changed) then the easiest way to revert it to the default is to reinstall the package.
In this case you'll have to use a different route to get root permissions for installing the package, so either log in to a TTY as root or use su - in a terminal. If you don't have a password set for root then you'll have to use a chroot, How to chroot Garuda Linux.