Cooker major changes - Upgrade is possible

People testing Cooker please do not upgrade until further communication, or your system will definitely break badly.
Thanks for your attention.

Developers and contributors reported that cooker update now it’s possible again.

The proper command is

$ sudo dnf clean all ; dnf clean all ; dnf repolist ; sudo dnf --refresh --allowerasing distro-sync

Please disable additional repositories before proceeding with the upgrade.
You can enable them again later.

The kernel has changed its name, users will have to manually type the install command.

Now the default in cooker is clang
$ sudo dnf install kernel-desktop

If you prefer the gcc compiled kernel
$ sudo dnf install kernel-desktop-gcc