fix: update sample for enabling or disabling a policy (#305)

Author: fhinkel

monitoring/snippets/alerts.js

@@ -1,5 +1,5 @@
 /**
- * Copyright 2018, Google, Inc.
+ * Copyright 2018 Google LLC
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
@@ -244,10 +244,10 @@ async function enablePolicies(projectId, enabled, filter) {
     policies
       .map(policy => {
         return {
-          updateMask: {paths: ['disabled']},
+          updateMask: {paths: ['enabled']},
           alertPolicy: {
             name: policy.name,
-            disabled: enabled ? false : true,
+            enabled: {value: enabled},
           },
         };
       })