Ubuntu: drop 16.04

Although ubuntu-16.04 is in Extended Security Maintenance until 2026, it
is holding us back from adding git-lfs (see
#40)

Signed-off-by: Tim Orling <[email protected]>

Author: moto-timo

.github/workflows/build-test-deploy.yml

@@ -27,7 +27,6 @@ jobs:
           fedora-34,
           fedora-35,
           opensuse-15.2,
-          ubuntu-16.04,
           ubuntu-18.04,
           ubuntu-20.04,
           ubuntu-22.04