Rerun build job to update ubuntu image LTE 20.04

[j-ferreira]

Hello together,

there is a new Ubuntu image for 20.04 in https://partner-images.canonical.com/oci/focal/current/
These new image has a few CVE fixes for OpenSSL etc.

Can you rerun your build job?

As a suggestion for improvement: it would also be useful to run the job automatically as soon as a new image exists.

[tianon]

This repository is no longer canonical; see #248 for more details.