message: Add CfnOutput import
diff: @@ -136,6 +136,8 @@ You might also want to reference a newly created resource in SST in Serverless F
  ```js title="SST"
  // Export in an SST stack
  +import { CfnOutput } from '@aws-cdk/core';
  +
  new CfnOutput(this, "TableName", {
  value: bucket.bucketArn,
  exportName: "MyBucketArn",
  