add comma

mmv1/third_party/terraform/resources/resource_container_cluster.go.erb

@@ -764,7 +764,7 @@ func resourceContainerCluster() *schema.Resource {
 				Optional:    true,
 				MaxItems:    1,
 				Computed:    true,
-				Deprecated:  `Basic authentication was removed for GKE cluster versions >= 1.19.`
+				Deprecated:  `Basic authentication was removed for GKE cluster versions >= 1.19.`,
 				Description: `The authentication information for accessing the Kubernetes master. Some values in this block are only returned by the API if your service account has permission to get credentials for your GKE cluster. If you see an unexpected diff removing a username/password or unsetting your client cert, ensure you have the container.clusters.getCredentials permission.`,
 				Elem: &schema.Resource{
 					Schema: map[string]*schema.Schema{