CI: Use new Ubuntu 22.04 image and remove deprecated Ubuntu 18.04 by bergmeister · Pull Request #1847 · PowerShell/PSScriptAnalyzer

Yes but I'd rather be explicit and due to them always offering at least 2 versions, we'd always have to update at least the older version, same for Ubuntu. Also, latest doesn't point to macos 12 but 11 atm so we couldn't use it otherwise atm. But if you'd rather trade less maintenance for less coverage then that's ok as well.