doc/dev: fix push step in release doc
@@ -43,7 +43,7 @@ Follow the prompts.
- After build, push image:
```bash
-$ IMAGE=quay.io/coreos/etcd-operator:$VERSION hack/build/operator/build
+$ IMAGE=quay.io/coreos/etcd-operator:$VERSION hack/build/docker_push
```
- Retag "latest":
