Doc: Update production-users.md
Doc: Update production-users.md

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