Documentation: add public key link to release doc
Documentation: add public key link to release doc

visheshnp/etcd,YuleiXiao/etcd,ravigadde/etcd,chipironcin/etcd,dannysauer/etcd,tguangch/etcd,nekto0n/etcd,westhood/etcd,linuxcer/etcd,mqliang/etcd,ajityagaty/etcd,luxas/etcd,insequent/etcd,chipironcin/etcd,sofuture/etcd,lumjjb/etcd,linuxcer/etcd,akauppi/etcd,achanda/etcd,sebrandon1/etcd,vimalk78/etcd,a-robinson/etcd,achanda/etcd,glycerine/etcd,swingbach/etcd,endocode/etcd,mkumatag/etcd,bluebreezecf/etcd,tamird/etcd,jlamillan/etcd,handsomesun/etcd,CrazyJvm/etcd,fanminshi/etcd,lumjjb/etcd,sinsharat/etcd,jonboulle/etcd,tamird/etcd,wantonsolutions/dinv-etcd,dnaeon/etcd,joshix/etcd,vimalk78/etcd,mickep76/etcd,nekto0n/etcd,bluebreezecf/etcd,bdarnell/etcd,cockroachdb/etcd,joshix/etcd,YuleiXiao/etcd,luxas/etcd,rchicoli/etcd,ravigadde/etcd,heyitsanthony/etcd,tguangch/etcd,lorneli/etcd,xiang90/etcd,insequent/etcd,qqsun8819/etcd,armstrongli/etcd,plasticbox/etcd,whuwxl/etcd,rnaveiras/etcd,yudai/etcd,wantonsolutions/dinv-etcd,purpleidea/etcd,mkumatag/etcd,handsomesun/etcd,OyTao/etcd_learning,jlamillan/etcd,coreos/etcd,heyitsanthony/etcd,ktateish/etcd,sinsharat/etcd,siddontang/etcd,li-ang/etcd,glycerine/etcd,sebrandon1/etcd,cockroachdb/etcd,visheshnp/etcd,xiang90/etcd,mickep76/etcd,siddontang/etcd,westhood/etcd,gyuho/etcd,plasticbox/etcd,hongchaodeng/etcd,a-robinson/etcd,StorReduce/etcd,glevand/coreos--etcd,jonboulle/etcd,hongchaodeng/etcd,rnaveiras/etcd,swingbach/etcd,purpleidea/etcd,zaphod-concur/etcd,StorReduce/etcd,sofuture/etcd,akauppi/etcd,fanminshi/etcd,dannysauer/etcd,ktateish/etcd,OyTao/etcd_learning,armstrongli/etcd,glevand/coreos--etcd,qqsun8819/etcd,etcd-io/etcd,etcd-io/etcd,bdarnell/etcd,zaphod-concur/etcd,mqliang/etcd,dnaeon/etcd,lorneli/etcd,rnaveiras/etcd,yudai/etcd,endocode/etcd,rchicoli/etcd,mkumatag/etcd,whuwxl/etcd,coreos/etcd,mqliang/etcd,wantonsolutions/dinv-etcd,ajityagaty/etcd,CrazyJvm/etcd,gyuho/etcd,ajityagaty/etcd,etcd-io/etcd,li-ang/etcd