ddl: fix spelling (#5234)
ddl: fix spelling (#5234)


ngaut/tidb,yangwenmai/tidb,pingcap/tidb,kyle-wang/tidb,pingcap/tidb,Cofyc/tidb,mccxj/tidb,pingcap/tidb,ming-relax/tidb,XuHuaiyu/tidb,qiuyesuifeng/tidb,c4pt0r/tidb,ming-relax/tidb,c4pt0r/tidb,EvilMcJerkface/tidb,kyle-wang/tidb,kyle-wang/tidb,c4pt0r/tidb,tiancaiamao/tidb,pingcap/tidb,kyle-wang/tidb,Cofyc/tidb,ngaut/tidb,c4pt0r/tidb,coocood/tidb,EvilMcJerkface/tidb,wusphinx/tidb,ngaut/tidb,ngaut/tidb,Nify/tidb,qiuyesuifeng/tidb,cosmtrek/tidb,CodeRushing/tidb,c4pt0r/tidb,pingcap/tidb,yangwenmai/tidb,CodeRushing/tidb,ngaut/tidb,kyle-wang/tidb,mccxj/tidb,c4pt0r/tidb,XuHuaiyu/tidb,tiancaiamao/tidb,spongedu/tidb,wusphinx/tidb,spongedu/tidb,cosmtrek/tidb,coocood/tidb,pingcap/tidb,kyle-wang/tidb,Nify/tidb,ngaut/tidb