sorbet: Bump some cmd/* files to typed: strict

[issyl0]

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• Part of Use Sorbet typed: strict in all (non-package) files in Homebrew organisation #17297.

[MikeMcQuaid]

Looks good, thanks @issyl0! Given how often these signatures sadly go 💥: let's hold off until after the next tag (which will be later today UK time, merge Tuesday UK time?)