Updated CONTRIBUTORS.md to include lebeg and gigasquid, moved mabreu to committers section (#12766)
Updated CONTRIBUTORS.md to include lebeg and gigasquid, moved mabreu to committers section (#12766)


yajiedesign/mxnet,larroy/mxnet,apache/incubator-mxnet,szha/mxnet,yajiedesign/mxnet,leezu/mxnet,sxjscience/mxnet,tlby/mxnet,DickJC123/mxnet,reminisce/mxnet,ptrendx/mxnet,eric-haibin-lin/mxnet,eric-haibin-lin/mxnet,ptrendx/mxnet,eric-haibin-lin/mxnet,larroy/mxnet,szha/mxnet,dmlc/mxnet,tlby/mxnet,ForkedReposBak/mxnet,zhreshold/mxnet,larroy/mxnet,reminisce/mxnet,zhreshold/mxnet,zhreshold/mxnet,ForkedReposBak/mxnet,reminisce/mxnet,szha/mxnet,zhreshold/mxnet,leezu/mxnet,ptrendx/mxnet,szha/mxnet,sxjscience/mxnet,tlby/mxnet,reminisce/mxnet,ForkedReposBak/mxnet,sxjscience/mxnet,ptrendx/mxnet,reminisce/mxnet,reminisce/mxnet,apache/incubator-mxnet,dmlc/mxnet,DickJC123/mxnet,ptrendx/mxnet,tlby/mxnet,leezu/mxnet,apache/incubator-mxnet,szha/mxnet,reminisce/mxnet,dmlc/mxnet,sxjscience/mxnet,leezu/mxnet,yajiedesign/mxnet,larroy/mxnet,sxjscience/mxnet,eric-haibin-lin/mxnet,tlby/mxnet,ptrendx/mxnet,ForkedReposBak/mxnet,dmlc/mxnet,tlby/mxnet,sxjscience/mxnet,leezu/mxnet,leezu/mxnet,sxjscience/mxnet,ForkedReposBak/mxnet,yajiedesign/mxnet,larroy/mxnet,szha/mxnet,tlby/mxnet,leezu/mxnet,zhreshold/mxnet,larroy/mxnet,dmlc/mxnet,eric-haibin-lin/mxnet,yajiedesign/mxnet,larroy/mxnet,szha/mxnet,dmlc/mxnet,reminisce/mxnet,ForkedReposBak/mxnet,DickJC123/mxnet,sxjscience/mxnet,yajiedesign/mxnet,eric-haibin-lin/mxnet,yajiedesign/mxnet,larroy/mxnet,larroy/mxnet,dmlc/mxnet,ForkedReposBak/mxnet,zhreshold/mxnet,yajiedesign/mxnet,ptrendx/mxnet,leezu/mxnet,dmlc/mxnet,tlby/mxnet,eric-haibin-lin/mxnet,eric-haibin-lin/mxnet,reminisce/mxnet,tlby/mxnet,apache/incubator-mxnet,zhreshold/mxnet,ForkedReposBak/mxnet,leezu/mxnet,dmlc/mxnet,sxjscience/mxnet,tlby/mxnet,szha/mxnet,eric-haibin-lin/mxnet,zhreshold/mxnet,ptrendx/mxnet,zhreshold/mxnet,DickJC123/mxnet,ptrendx/mxnet,szha/mxnet,ForkedReposBak/mxnet,ptrendx/mxnet,yajiedesign/mxnet,reminisce/mxnet