feat: Run yore after generating the changelog

[pawamoy]

Generating the changelog means we're likely ready to publish a new version. We should grep the added version from the changelog and run yore with this version.

I also thought about running yore before the release duty, but in cases where we know Python X is EOL but still want to publish a few more releases before removing support, it would be annoying. Maybe Yore should allow disabling EOL checks. But anyway, it's better to run yore immediately after updating the changelog, because we sometimes edit it manually, so it's best to warn early, before we've edited it.