darktable 4.6.1 released

Let’s KISS to avoid confusion and only use one release workflow (AFAIK we don’t have an “official” release one on GitHub yet, therefore it should be your local/manual one as usual) and one package per platform, please.

@Pascal_Obry I think it would be wise to remove this package, and rename the darktable-4.6.1-arm64-macOS-12.5.dmg as the only one supported. Let’s keep the process identical for patch releases, please.