BZ-2060950 fixing incorrect apiVersion in HTTP2 code sample

Author: bscott-rh

modules/nw-http2-haproxy.adoc

@@ -46,9 +46,10 @@ $ oc annotate ingresses.config/cluster ingress.operator.openshift.io/default-ena
 You can alternatively apply the following YAML to add the annotation:
 [source,yaml]
 ----
-apiVersion: operator.openshift.io/v1
-kind: IngressController
+apiVersion: config.openshift.io/v1
+kind: Ingress
 metadata:
+  name: cluster
   annotations:
     ingress.operator.openshift.io/default-enable-http2: "true"
 ----