Mark Goddard b39964e501 CI: Switch upgrade jobs to Ubuntu focal 20.04
Since Victoria supports focal, we can switch the upgrade jobs to run on
focal.

Change-Id: I8f150b443af4fb831332836f90a9c38ff61a17cc
2020-12-21 10:57:15 +00:00
..
2020-11-19 18:11:40 +08:00
2020-02-10 14:07:53 +00:00
2020-12-10 21:21:07 +01:00