mono doesn't support apple silicon yet

[jwokaty]

Attempting to run mono on apple silicon, it installs but reports:

                  `mono` does not include MSBuild on Apple Silicon as current version
                  requires .NET 5 but Apple Silicon support was added in .NET 6.
                  If you need a complete package, then install via Rosetta or as a Cask.

As a consequence, rawrr won't be available on apple silicon unless there's an alternative installation method.