mkosi: update default ubuntu distribution

Update default to a currently supported version

diff --git a/mkosi b/mkosi
index dfebdafe079257ddaa494943d7af20878cb57a5b..40cd8fe44004b000bc092bfa9e39d75b49e79a3a 100755 (executable)
--- a/mkosi
+++ b/mkosi
@@ -2605,7 +2605,7 @@ def load_args():
         elif args.distribution == Distribution.debian:
             args.release = "unstable"
         elif args.distribution == Distribution.ubuntu:
-            args.release = "yakkety"
+            args.release = "artful"
         elif args.distribution == Distribution.opensuse:
             args.release = "tumbleweed"