readme: add upgrade build badge
@@ -3,8 +3,8 @@ unit/integration:
[![Build Status](https://jenkins-etcd-public.prod.coreos.systems/view/operator/job/etcd-operator-unit-master/badge/icon)](https://jenkins-etcd-public.prod.coreos.systems/view/operator/job/etcd-operator-unit-master/)
e2e (Kubernetes stable):
[![Build Status](https://jenkins-etcd-public.prod.coreos.systems/buildStatus/icon?job=etcd-operator-master)](https://jenkins-etcd-public.prod.coreos.systems/job/etcd-operator-master/)
-e2e (Kubernetes master):
-[![Build Status](https://jenkins-etcd-public.prod.coreos.systems/buildStatus/icon?job=etcd-operator-master-k8s-master)](https://jenkins-etcd-public.prod.coreos.systems/job/etcd-operator-master-k8s-master/)
+e2e (upgrade):
+[![Build Status](https://jenkins-etcd.prod.coreos.systems/buildStatus/icon?job=etcd-operator-upgrade)](https://jenkins-etcd.prod.coreos.systems/job/etcd-operator-upgrade/)
### Project status: beta
