Update homebrew install command

[rngtng]

cask is not a command anymore

• Please check if the PR fulfills these requirements

• [ ] The commit message follows the guidelines

• [] Docs have been added / updated (for bug fixes / features)

• What kind of change does this PR introduce? (Bug fix, feature, docs update, ...) docs update

• What is the current behavior? (You can also link to an open issue here)

  ❯ brew cask install adur1990/tap/passformacos
  Error: Unknown command: cask

• What is the new behavior (if this is a feature change)?

  
  brew install --cask adur1990/tap/passformacos
  Updating Homebrew...
  ==> Auto-updated Homebrew!
  Updated 1 tap (homebrew/core).
  ==> Updated Formulae
  Updated 36 formulae.

==> Tapping adur1990/tap Cloning into '/usr/local/Homebrew/Library/Taps/adur1990/homebrew-tap'... ...

* **Does this PR introduce a breaking change?** (What changes might users need to make in their application due to this PR?)
no

* **Other information**: