Update QUICKSTART.md (#1747)
Update QUICKSTART.md (#1747)

eliminating ambiguity.
qiuyesuifeng/tidb,pingcap/tidb,kyle-wang/tidb,silentred/tidb,liyu4/tidb,silenceper/tidb,zs634134578/tidb,spongedu/tidb,liyu4/tidb,c4pt0r/tidb,myrice/tidb,louishust/tidb,ngaut/tidb,qiuyesuifeng/tidb,coocood/tidb,ngaut/tidb,EvilMcJerkface/tidb,kyle-wang/tidb,tiancaiamao/tidb,Cofyc/tidb,pingcap/tidb,ueizhou/tidb,pingcap/tidb,gaocegege/tidb,kyle-wang/tidb,mccxj/tidb,wusphinx/tidb,wusphinx/tidb,ming-relax/tidb,XuHuaiyu/tidb,zimulala/tidb,kyle-wang/tidb,Cofyc/tidb,louishust/tidb,kyle-wang/tidb,silenceper/tidb,ueizhou/tidb,ngaut/tidb,yuanwhy/tidb,simon-xia/tidb,anywhy/tidb,CodeRushing/tidb,c4pt0r/tidb,coocood/tidb,zimulala/tidb,ngaut/tidb,XuHuaiyu/tidb,silentred/tidb,c4pt0r/tidb,simon-xia/tidb,ming-relax/tidb,ngaut/tidb,astaxie/tidb,yangwenmai/tidb,c4pt0r/tidb,c4pt0r/tidb,spongedu/tidb,zs634134578/tidb,kyle-wang/tidb,andelf/tidb,8cbx/tidb,yangwenmai/tidb,cosmtrek/tidb,c4pt0r/tidb,cosmtrek/tidb,JinheLin/tidb,myrice/tidb,tiancaiamao/tidb,qhsong/tidb,EvilMcJerkface/tidb,andelf/tidb,8cbx/tidb,ngaut/tidb,pingcap/tidb,mccxj/tidb,astaxie/tidb,yuanwhy/tidb,CodeRushing/tidb,anywhy/tidb,Nify/tidb,pingcap/tidb,qhsong/tidb,pingcap/tidb,JinheLin/tidb,Nify/tidb,gaocegege/tidb