Update CI to use windows-2022

[dsnopek]

We're currently using windows-2019 for our Windows builds, and it looks like GitHub is going to retire it on 2025-06-30 (6 days from now):

actions/runner-images#12045

This PR updates to using windows-2022

[Repiteo]

Actually wait, I dunno how y'all handle milestones here. Leaving it on 4.x just in case

[raulsntos]

Any reason not to use windows-latest? That seems to be what the main Godot repo uses:

https://github.com/godotengine/godot/blob/05640191e7c08ffe34f62de39ec52d7dcf198923/.github/workflows/windows_builds.yml#L20

[dsnopek]

Personally, I prefer pointing at a specific version, because, theoretically, it means we won't suddenly be hit with failing builds when a new Windows version becomes available. But I say "theoretically" because we can still be hit with failing builds when GitHub decides to retire a version or do a "scheduled brownout". GitHub breaks my theory :-(

So, maybe it would, in fact, be better to use windows-latest! That probably applies to the Linux ones too

[Ivorforce]

Personally, I prefer pointing at a specific version, because, theoretically, it means we won't suddenly be hit with failing builds when a new Windows version becomes available. But I say "theoretically" because we can still be hit with failing builds when GitHub decides to retire a version or do a "scheduled brownout". GitHub breaks my theory :-(

So, maybe it would, in fact, be better to use windows-latest! That probably applies to the Linux ones too

Practically, the earlier versions are probably more stable anyway. Especially right after release of a new runner, software might not yet be compatible while bugs are being ironed out. So even with the brownouts, I'd probably continue to use explicit version specifiers.