fix README

Signed-off-by: Carlos Eduardo Arango Gutierrez <carangog@redhat.com>

README.md

@@ -30,7 +30,7 @@ make image IMAGE=<my repo>:<my tag>
 Optionally you can push it to your image repo
 
 ```bash
-make image-push IMAGE=<my repo>:<my tag>
+make push IMAGE=<my repo>:<my tag>
 ```
 
 Alternatively, instead of specifying variables on the command line, you can edit the Makefile to permanently change parameter defaults like name of the image or namespace where the operator is deployed.