Fix lint errors in Homebrew formula

[chriso]

For example, see https://github.com/dispatchrun/homebrew-dispatch/actions/runs/8933963803/job/24540148756

Note that the formula(s) are defined in another repo: https://github.com/dispatchrun/dispatch/blob/12c3eeb3cdaae8c58a2c2b27f6ad81036e313282/.goreleaser.yml#L31