typo in tutorials index (#10318)
typo in tutorials index (#10318)

* Update index.md

* Update index.md

* Update index.md

mbaijal/incubator-mxnet,navrasio/mxnet,tlby/mxnet,ForkedReposBak/mxnet,dmlc/mxnet,tlby/mxnet,precedenceguo/mxnet,larroy/mxnet,precedenceguo/mxnet,CodingCat/mxnet,tlby/mxnet,eric-haibin-lin/mxnet,sxjscience/mxnet,indhub/mxnet,eric-haibin-lin/mxnet,ForkedReposBak/mxnet,reminisce/mxnet,luoyetx/mxnet,yajiedesign/mxnet,larroy/mxnet,eric-haibin-lin/mxnet,fullfanta/mxnet,luoyetx/mxnet,mbaijal/incubator-mxnet,indhub/mxnet,tlby/mxnet,jamesliu/mxnet,apache/incubator-mxnet,CodingCat/mxnet,rahul003/mxnet,precedenceguo/mxnet,reminisce/mxnet,leezu/mxnet,zhreshold/mxnet,larroy/mxnet,zhreshold/mxnet,yajiedesign/mxnet,precedenceguo/mxnet,luoyetx/mxnet,ptrendx/mxnet,yajiedesign/mxnet,TuSimple/mxnet,indhub/mxnet,zhreshold/mxnet,reminisce/mxnet,dmlc/mxnet,zhreshold/mxnet,luoyetx/mxnet,eric-haibin-lin/mxnet,mbaijal/incubator-mxnet,ForkedReposBak/mxnet,luoyetx/mxnet,TuSimple/mxnet,indhub/mxnet,leezu/mxnet,ptrendx/mxnet,szha/mxnet,indhub/mxnet,zhreshold/mxnet,yajiedesign/mxnet,luoyetx/mxnet,fullfanta/mxnet,ForkedReposBak/mxnet,reminisce/mxnet,ptrendx/mxnet,szha/mxnet,rahul003/mxnet,rahul003/mxnet,mbaijal/incubator-mxnet,rahul003/mxnet,reminisce/mxnet,TuSimple/mxnet,eric-haibin-lin/mxnet,navrasio/mxnet,yajiedesign/mxnet,tlby/mxnet,DickJC123/mxnet,larroy/mxnet,rahul003/mxnet,fullfanta/mxnet,CodingCat/mxnet,sxjscience/mxnet,larroy/mxnet,sxjscience/mxnet,DickJC123/mxnet,ptrendx/mxnet,ptrendx/mxnet,sxjscience/mxnet,tlby/mxnet,TuSimple/mxnet,ForkedReposBak/mxnet,fullfanta/mxnet,dmlc/mxnet,jamesliu/mxnet,jamesliu/mxnet,TuSimple/mxnet,rahul003/mxnet,indhub/mxnet,dmlc/mxnet,ptrendx/mxnet,leezu/mxnet,mbaijal/incubator-mxnet,sxjscience/mxnet,szha/mxnet,fullfanta/mxnet,TuSimple/mxnet,apache/incubator-mxnet,navrasio/mxnet,ForkedReposBak/mxnet,CodingCat/mxnet,yajiedesign/mxnet,ForkedReposBak/mxnet,larroy/mxnet,apache/incubator-mxnet,yajiedesign/mxnet,reminisce/mxnet,CodingCat/mxnet,TuSimple/mxnet,navrasio/mxnet,fullfanta/mxnet,szha/mxnet,zhreshold/mxnet,TuSimple/mxnet,navrasio/mxnet,mbaijal/incubator-mxnet,fullfanta/mxnet,CodingCat/mxnet,precedenceguo/mxnet,leezu/mxnet,szha/mxnet,sxjscience/mxnet,larroy/mxnet,tlby/mxnet,dmlc/mxnet,tlby/mxnet,TuSimple/mxnet,rahul003/mxnet,leezu/mxnet,indhub/mxnet,CodingCat/mxnet,leezu/mxnet,zhreshold/mxnet,leezu/mxnet,dmlc/mxnet,luoyetx/mxnet,CodingCat/mxnet,TuSimple/mxnet,reminisce/mxnet,eric-haibin-lin/mxnet,navrasio/mxnet,jamesliu/mxnet,navrasio/mxnet,reminisce/mxnet,indhub/mxnet,zhreshold/mxnet,sxjscience/mxnet,eric-haibin-lin/mxnet,eric-haibin-lin/mxnet,mbaijal/incubator-mxnet,sxjscience/mxnet,zhreshold/mxnet,eric-haibin-lin/mxnet,DickJC123/mxnet,rahul003/mxnet,szha/mxnet,szha/mxnet,precedenceguo/mxnet,tlby/mxnet,dmlc/mxnet,ptrendx/mxnet,ForkedReposBak/mxnet,luoyetx/mxnet,szha/mxnet,tlby/mxnet,dmlc/mxnet,dmlc/mxnet,DickJC123/mxnet,ptrendx/mxnet,yajiedesign/mxnet,sxjscience/mxnet,fullfanta/mxnet,leezu/mxnet,jamesliu/mxnet,jamesliu/mxnet,navrasio/mxnet,ptrendx/mxnet,rahul003/mxnet,fullfanta/mxnet,larroy/mxnet,apache/incubator-mxnet,reminisce/mxnet,mbaijal/incubator-mxnet,precedenceguo/mxnet,jamesliu/mxnet,jamesliu/mxnet,ForkedReposBak/mxnet,ptrendx/mxnet,leezu/mxnet,jamesliu/mxnet,CodingCat/mxnet,luoyetx/mxnet,mbaijal/incubator-mxnet,szha/mxnet,reminisce/mxnet,navrasio/mxnet,yajiedesign/mxnet,precedenceguo/mxnet,larroy/mxnet,precedenceguo/mxnet,indhub/mxnet