fixed readme typo
fixed readme typo

sadfuzzy/jstree,duzun/jstree,ninvfeng/jstree,samokspv/jstree,neogis-de/jstree,ninvfeng/jstree,gustavobg/jstree,samokspv/jstree,gustavobg/jstree,vakata/jstree,Aliccer/jstree,aihua/jstree,jacksonpradolima/jstree,jacksonpradolima/jstree,opencmii/jstree,JuseChen/jstree,Project-TF/jstree,Contagious06/jstree,beealone/jstree,500tech/jstree,codio/jstree,jacksonpradolima/jstree,Aliccer/jstree,Aliccer/jstree,samokspv/jstree,beealone/jstree,duzun/jstree,aihua/jstree,opencmii/jstree,neogis-de/jstree,gustavobg/jstree,neogis-de/jstree,500tech/jstree,JuseChen/jstree,sadfuzzy/jstree,Project-TF/jstree,sadfuzzy/jstree,vakata/jstree,beealone/jstree,AnuchitPrasertsang/jstree,codio/jstree,Contagious06/jstree,iCasa/jstree,opencmii/jstree,aihua/jstree,iCasa/jstree,Contagious06/jstree,ninvfeng/jstree,AnuchitPrasertsang/jstree,JuseChen/jstree,iCasa/jstree,500tech/jstree