Installing nix in Fedora Kinoite removes SDDM config

[tazihad]

Installed nix using the script.

curl --proto '=https' --tlsv1.2 -sSf -L https://install.determinate.systems/nix | sh -s -- install

After the next boot I can see the sddm is basic. And /etc/sddm.conf is empty. Removing previous sddm config.

This bug is also reported in https://github.com/DeterminateSystems/nix-installer/issues/912#issuecomment-2053682535

So, I had to manually repopulate the config to make sddm look normal.