ubuntu: add some missing EOL dates
The exact days are approximate, only the month is mentioned in the canonical website.
This affects products like cockpit machines which hide OSes in UIs that
don't have defined EOL date.
The 17.0 major release is coming on May 16, 2024! This version brings many exciting improvements to GitLab, but also removes some deprecated features. We are introducing three breaking change windows during which we expect breaking changes to be deployed to GitLab.com. You can read more about it on our blogpost. The third breaking change window begins 2024-05-06 09:00 UTC and ends 2024-05-08 22:00 UTC.
The exact days are approximate, only the month is mentioned in the canonical website.
This affects products like cockpit machines which hide OSes in UIs that
don't have defined EOL date.