Update role_binding.yaml

Author: yuvallevy2

multi-namespace-redb/role_binding.yaml

@@ -6,6 +6,9 @@ subjects:
 - kind: ServiceAccount
   name: redis-enterprise-operator
   namespace: NAMESPACE_OF_SERVICE_ACCOUNT
+- kind: ServiceAccount
+  name: redis-enterprise-admission
+  namespace: NAMESPACE_OF_SERVICE_ACCOUNT
 - kind: ServiceAccount
   name: NAME_OF_REC_SERVICE_ACCOUNT  # service account of the REC, usually the same as the name of the custom resource
   namespace: NAMESPACE_OF_SERVICE_ACCOUNT