added feature flag to vpc dual stack change

Author: Maharaj Haider

packages/aws-cdk-lib/cx-api/lib/features.ts

@@ -1582,7 +1582,7 @@ export const FLAGS: Record<string, FlagInfo> = {
     detailsMd: `
       When this feature flag is enabled, EgressOnlyGateway resource will not be created when you create a vpc with only public subnets. A  
           `,
-    introducedIn: { v2: '2.196.0' },
+    introducedIn: { v2: 'V2NEXT' },
     defaults: { v2: false },
     recommendedValue: true,
   },