CHANGELOG: minor formatting update in previous releases
CHANGELOG: minor formatting update in previous releases

Signed-off-by: Gyuho Lee <3454051ee3341eb69bdf6fca40899cdad4d86496@gmail.com>

sinsharat/etcd,bdarnell/etcd,li-ang/etcd,rnaveiras/etcd,bdarnell/etcd,joshix/etcd,rnaveiras/etcd,vimalk78/etcd,cockroachdb/etcd,heyitsanthony/etcd,whuwxl/etcd,coreos/etcd,etcd-io/etcd,cockroachdb/etcd,mkumatag/etcd,fanminshi/etcd,mkumatag/etcd,sebrandon1/etcd,heyitsanthony/etcd,sebrandon1/etcd,coreos/etcd,dannysauer/etcd,joshix/etcd,gyuho/etcd,ajityagaty/etcd,dannysauer/etcd,mqliang/etcd,bluebreezecf/etcd,mkumatag/etcd,xiang90/etcd,mqliang/etcd,li-ang/etcd,whuwxl/etcd,gyuho/etcd,bluebreezecf/etcd,sinsharat/etcd,etcd-io/etcd,etcd-io/etcd,glevand/coreos--etcd,ajityagaty/etcd,fanminshi/etcd,lorneli/etcd,glevand/coreos--etcd,vimalk78/etcd,ajityagaty/etcd,mqliang/etcd,rnaveiras/etcd,lorneli/etcd,xiang90/etcd