pr-automerge: fix variable name
pr-automerge: fix variable name

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