This seems to be targeting the desktop flavor of Ubuntu 24.04. So this does not directly apply to Cloudron. For Cloudron, please follow https://docs.cloudron.io/guides/upgrade-ubuntu-24/
FWIW, I just upgraded from Ubuntu 18 this evening. Cloudron's documentation from going from 18 to 20 was quite helpful, re: a collectd edit that I never would have thought to make, plus the specific MySQL Server migration rules. Everything went smoothly, but without the documentation, it wouldn't have. So kudos to the team.
