Look into automated support for python-libjuju releases

[james-garner-canonical]

Description

When looking into #1099, we noticed that python-libjuju didn't have updated schema.json files added from juju on recent releases. As this is currently a purely manual process, it's easy to leave things out. One possibility would be to use github workflows to automatically create an issue here on python-libjuju with a checklist of release tasks every time juju has a release.

For example, maybe we could use repository-dispatch to have juju send an event to python-libjuju on release. Or maybe python-libjuju could just compare the recent builds of juju to the version in schema-$VERSION.json on a cronjob.

Urgency

Casually wishlisting