update README.md

docs/io.md

@@ -84,7 +84,7 @@
 | network\_data\_plane | (Optional) Specifies the eBPF data plane used for building the Kubernetes network. Possible value is `cilium`. Changing this forces a new resource to be created. | `string` | `null` | no |
 | network\_plugin | Network plugin to use for networking. | `string` | `"azure"` | no |
 | network\_plugin\_mode | (Optional) Specifies the network plugin mode used for building the Kubernetes network. Possible value is `Overlay`. Changing this forces a new resource to be created. | `string` | `null` | no |
-| network\_policy | (Optional) Sets up network policy to be used with Azure CNI. Network policy allows us to control the traffic flow between pods. Currently supported values are calico and azure. Changing this forces a new resource to be created. | `string` | `null` | no |
+| network\_policy | (Optional) Sets up network policy to be used with Azure CNI. Network policy allows us to control the traffic flow between pods. Currently supported values are calico and azure. Changing this forces a new resource to be created. | `string` | `"azure"` | no |
 | node\_public\_ip\_tags | Node network profile configuration | `map(string)` | `{}` | no |
 | node\_resource\_group | Name of the resource group in which to put AKS nodes. If null default to MC\_<AKS RG Name> | `string` | `null` | no |
 | nodes\_pools | A list of nodes pools to create, each item supports same properties as `local.default_agent_profile` | `list(any)` | `[]` | no |