ci: add latest Ubuntu release

It is easy to forget to roll to new Ubuntu (or Fedora) release, so
always test on the latest Ubuntu version as well.

Signed-off-by: Krzysztof Kozlowski <[email protected]>

Author: krzk

.github/workflows/ci.yml

@@ -47,6 +47,7 @@ jobs:
           - fedora:39
           - fedora:38
           - fedora:37
+          - ubuntu:latest
           - ubuntu:noble
           - ubuntu:mantic
           - ubuntu:jammy