message: Docs: fix typos with infra test example
diff: @@ -50,11 +50,12 @@ Here is an example test
  ```ts
  import { Stack, App } from "@serverless-stack/resources"
  +import { Template } from "aws-cdk-lib/assertions"
  -test("cdk.queue: is undefined", async () => {
  +test("queue exists", async () => {
  const app = new App()
  const stack = new MyStack(app)
  const template = Template.fromStack(MyStack);
  - template.resourceCountIs("AWS::SQS::Queue, 1);
  + template.resourceCountIs("AWS::SQS::Queue", 1);
  });
  ```
  