updating documenation for new phases name

docs/cli/kops_update_cluster.md

@@ -29,7 +29,7 @@ kops update cluster
       --create-kube-config      Will control automatically creating the kube config file on your local filesystem (default true)
       --model string            Models to apply (separate multiple models with commas) (default "config,proto,cloudup")
       --out string              Path to write any local output
-      --phase string            Subset of tasks to run: assets, cluster, iam, load-balancers, network, security-groups
+      --phase string            Subset of tasks to run: assets, cluster, network, security
       --ssh-public-key string   SSH public key to use (deprecated: use kops create secret instead)
       --target string           Target - direct, terraform, cloudformation (default "direct")
       --yes                     Actually create cloud resources