corrects typo in crypto-square readme
corrects typo in crypto-square readme
exercism/x-common,Vankog/problem-specifications,exercism/x-common,jmluy/x-common,rpottsoh/x-common,Vankog/problem-specifications,petertseng/x-common,rpottsoh/x-common,kgengler/x-common,ErikSchierboom/x-common,jmluy/x-common,ErikSchierboom/x-common,jmluy/x-common,petertseng/x-common,wobh/x-common,kgengler/x-common