Code review comment for ~jugmac00/launchpadlib:add-minimal-CI-configuration

> In order to run all tox environments, we need to discuss a proper way
how to provide different Python versions.

I guess, for that we can specify different test jobs for each series/python version:

jobs:
  test-focal:
    series: focal
    run: tox -e py38
  test-jammy:
    series: jammy
    run: tox -e py310