Update CHANGELOG-3.5.md
Update CHANGELOG-3.5.md

etcd-io/etcd,mqliang/etcd,ajityagaty/etcd,gyuho/etcd,ajityagaty/etcd,coreos/etcd,rnaveiras/etcd,etcd-io/etcd,gyuho/etcd,mqliang/etcd,rnaveiras/etcd,mkumatag/etcd,mqliang/etcd,rnaveiras/etcd,coreos/etcd,ajityagaty/etcd,mkumatag/etcd,mkumatag/etcd,etcd-io/etcd