Fix closed network options in cdk.json (#1302)

Co-authored-by: Taichiro Suzuki <taichirs@amazon.co.jp>

Author: tbrand

packages/cdk/cdk.json

@@ -77,8 +77,9 @@
     "crossAccountBedrockRoleArn": "",
     "useCaseBuilderEnabled": true,
     "closedNetworkMode": false,
-    "closedNetworkAppIpv4Cidr": "10.0.0.0/16",
-    "closedNetworkUserIpv4Cidr": "10.1.0.0/16",
+    "closedNetworkVpcIpv4Cidr": "10.0.0.0/16",
+    "closedNetworkVpcId": null,
+    "closedNetworkSubnetIds": null,
     "closedNetworkCertificateArn": null,
     "closedNetworkDomainName": null,
     "closedNetworkCreateTestEnvironment": true,