rdbf Usually during the upgrade the sources get updated, if they don't update they will be named eg enhance.list.distUpgrade. Ubuntu Pro updated automatically.
To fix the sources you need to edit the file and replace jammy with noble and then save and rename to .list using the old format which will work or as you posted using that format.
If you just rename the .list.distUpgrade file to .sources then you will get an update error ---> Malformed stanza 1 in source list.
As I already upgraded the OS on a test VPS last week still using the 3.01 appcd, I just changed the apt list files from jammy to noble today for the new version.
Updated from the original sources and saved as .list
deb [arch=amd64, signed-by=/usr/share/keyrings/enhance.gpg] https://apt.enhance.com noble main
and
deb [arch=amd64 signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/ubuntu noble stable
Probably should update the files to match the newer format though for future updates