Add new API to non-operator constants

Author: Max Hniebergall

x-pack/plugin/security/qa/operator-privileges-tests/src/javaRestTest/java/org/elasticsearch/xpack/security/operator/Constants.java

@@ -174,6 +174,7 @@ public class Constants {
         "cluster:admin/xpack/enrich/reindex",
         "cluster:admin/xpack/inference/delete",
         "cluster:admin/xpack/inference/put",
+        "cluster:admin/xpack/inference/update",
         "cluster:admin/xpack/license/basic_status",
         // "cluster:admin/xpack/license/delete",
         "cluster:admin/xpack/license/feature_usage",