Install Cinnamon (X11) on Fedora Silverblue

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sudo rpm-ostree refresh-md
sudo rpm-ostree install cinnamon cinnamon-session gnome-session-xsession

I'm not totally sure if the cinnamon-session package is necessary, but the gnome-session-xsession definitely is required to be able to run the X11 version of Cinnamon. Without it, only the experimental Wayland version of Cinnamon will be installed.