Add type signatures to `GitHub::Actions`.
Add type signatures to `GitHub::Actions`.

sjackman/homebrew,EricFromCanada/brew,EricFromCanada/brew,EricFromCanada/brew,JCount/brew,nandub/brew,vitorgalvao/brew,vitorgalvao/brew,claui/brew,nandub/brew,JCount/brew,reitermarkus/brew,konqui/brew,claui/brew,JCount/brew,claui/brew,konqui/brew,Homebrew/brew,reitermarkus/brew,claui/brew,MikeMcQuaid/brew,MikeMcQuaid/brew,sjackman/homebrew,nandub/brew,MikeMcQuaid/brew,nandub/brew,reitermarkus/brew,vitorgalvao/brew,Homebrew/brew,EricFromCanada/brew,sjackman/homebrew,Homebrew/brew,Homebrew/brew,konqui/brew,konqui/brew,JCount/brew,vitorgalvao/brew,reitermarkus/brew,MikeMcQuaid/brew,sjackman/homebrew