message: Fix: docs CDK v1 -> v2
  The documentation referenced CDK v1, which is no longer used.
  This commit fixes the documentation to reference CDK v2, as is actually the case.
diff: @@ -14,7 +14,7 @@ All CDK constructs and CloudFormation resources are supported in SST apps.
  Here is an example of creating a VPC using the CDK construct, and then using the VPC inside the [`Api`](../constructs/Api.md) construct.
  ```ts
  -import { Vpc } from "@aws-cdk/aws-ec2";
  +import { Vpc } from "aws-cdk-lib/aws-ec2";
  import { Api, StackContext } from "@serverless-stack/resources";
  function Stack({ stack }: StackContext) {
  