README: update meeting notes link
README: update meeting notes link

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

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