Update use-network-policies.md

Author: CocoWang-wql

articles/aks/use-network-policies.md

@@ -67,7 +67,7 @@ The following example script:
 * Creates an AKS cluster with system-assigned identity and enables network policy.
     * The _Azure Network_ policy option is used. To use Calico as the network policy option instead, use the `--network-policy calico` parameter. Note: Calico could be used with either `--network-plugin azure` or `--network-plugin kubenet`.
 
-Note that instead of using a system-assigned identity, you can also use a user-assigned identity. For more information, see [Use managed identities](use-managed-identity.md).
+Instead of using a system-assigned identity, you can also use a user-assigned identity. For more information, see [Use managed identities](use-managed-identity.md).
 
 ### Create an AKS cluster for Azure network policies