Fix typo in helm values documentation

Co-authored-by: Akshay Gupta <aksgupta@microsoft.com>

docs/helm-values-documenation.md

@@ -14,7 +14,7 @@
 | `appgw.shared` | false | This boolean flag should be defaulted to `false`. Set to `true` should you need a [Shared App Gateway](setup/install-existing.md#multi-cluster--shared-app-gateway). |
 | `appgw.subResourceNamePrefix` | No prefix if empty | Prefix that should be used in the naming of the Application Gateway's sub-resources|
 | `kubernetes.watchNamespace` | Watches all if empty | Specify the name space, which AGIC should watch. This could be a single string value, or a comma-separated list of namespaces. |
-| `kubernetes.rbac` | false | Specify true if kubernetes cluster is rbac enabled |
+| `rbac.enabled` | false | Specify true if kubernetes cluster is rbac enabled |
 | `armAuth.type` | | could be `aadPodIdentity` or `servicePrincipal` |
 | `armAuth.identityResourceID` | | Resource ID of the Azure Managed Identity |
 | `armAuth.identityClientId` | | The Client ID of the Identity. See below for more information on Identity |