*: tiny update CONTRIBUTING.md (#8814)
*: tiny update CONTRIBUTING.md (#8814)


ngaut/tidb,ming-relax/tidb,pingcap/tidb,pingcap/tidb,c4pt0r/tidb,EvilMcJerkface/tidb,pingcap/tidb,coocood/tidb,ngaut/tidb,pingcap/tidb,kyle-wang/tidb,ngaut/tidb,c4pt0r/tidb,ngaut/tidb,c4pt0r/tidb,c4pt0r/tidb,qiuyesuifeng/tidb,kyle-wang/tidb,c4pt0r/tidb,kyle-wang/tidb,ming-relax/tidb,cosmtrek/tidb,coocood/tidb,pingcap/tidb,c4pt0r/tidb,ngaut/tidb,kyle-wang/tidb,kyle-wang/tidb,kyle-wang/tidb,ngaut/tidb,pingcap/tidb,cosmtrek/tidb,Cofyc/tidb,XuHuaiyu/tidb,Cofyc/tidb,EvilMcJerkface/tidb,qiuyesuifeng/tidb,XuHuaiyu/tidb