fix(bundle): declare com.redhat.openshift.versions for OpenShift cert (#80)

OpenShift community-operators-prod validation fails: minKubeVersion
1.28.0 but com.redhat.openshift.versions not set. Declares v4.15 (k8s
1.28 -> OCP 4.15).

Author: stubbi

bundle/metadata/annotations.yaml

@@ -5,3 +5,4 @@ annotations:
   operators.operatorframework.io.bundle.package.v1: hermes-operator
   operators.operatorframework.io.bundle.channels.v1: stable
   operators.operatorframework.io.bundle.channel.default.v1: stable
+  com.redhat.openshift.versions: "v4.15"