Display sources.list entries for ppa noble+ is not deb822

[Catherine Redfield]

On a PPA under the "Technical details about this PPA" section, there is a Ubuntu version dropdown. When you select noble or oracular, the recommended way to add the PPA to your system is still single-line sources.list entries. However, apt sources in these versions should be deb822 and it would be nice to have the dropdown offer the deb822 format when you select noble or later versions.