message: update testing pattern wording
diff: @@ -79,7 +79,7 @@ After deployment, the X-Ray service map looks something like (You get two circle
  Or if you look at CloudWatch Service Lens:
  -![cloudwatch service map](img/cloudwatch_service_lens.png)
  +![cloudwatch service lens](img/cloudwatch_service_lens.png)
  You can see that these two diagrams aren't a massive distance away from my high level conceptual flow, the difference is the X-Ray generated diagram is 100% accurate because it is created from real traces based on user flow. When viewed through the AWS Console, it cannot become the out of date diagram you found on a wiki last updated 12 months ago - it is always accurate. If a developer checks in a piece of code that changes the flow, you will see it immediately.
  @@ -92,6 +92,10 @@ Any URL you hit on that gateway will trigger this flow, it uses your URL as the
  This URL is inserted into DynamoDB with a counter of how many times it was hit, the SNS and the SQS consumer lambdas both log the message to CloudWatch.
  +To see the random service errors try to hit the URL at least 10 times then you can either navigate to the X-Ray section of the AWS Console followed by clicking on "Service Map" in the sidebar. Please be aware that sometimes there can be a 30 second or so delay before your calls show up in service map.
  +
  +Alternatively you can go to CloudWatch in the AWS Console and click "Service Lens" in the sidebar. Both offer views onto the system.
  +
  ## Deliberate Random Errors
  I introduced a random SSL Cert error into the Lambda that connects to the External Http Endpoint to let you experiment with using X-Ray to source an error
  