Update clusterdefinition.md
Fix apiserver options table markdown
@@ -290,6 +290,7 @@ See [here](https://kubernetes.io/docs/reference/generated/kube-apiserver/) for a
Below is a list of apiserver options that acs-engine will configure by default:
|apiserver option|default value|
+|---|---|
|"--admission-control"|"NamespaceLifecycle, LimitRanger, ServiceAccount, DefaultStorageClass, ResourceQuota, DenyEscalatingExec, AlwaysPullImages, SecurityContextDeny"|
|"--authorization-mode"|"Node", "RBAC" (*the latter if enabledRbac is true*)|
|"--feature-gates"|No default (can be a comma-separated list)|
