docs: clarify squash/merge vs rebase/merge
docs: clarify squash/merge vs rebase/merge

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