docs: Quickstart screenshot is out of date

[StephenFluin]

I'm submitting a ...

[ ] Regression (behavior that used to work and stopped working in a new release)
[X] Bug report 
[ ] Feature request
[ ] Documentation issue or request
[ ] Support request => Please do not submit support request here, instead see https://github.com/angular/angular/blob/master/CONTRIBUTING.md#question

Current behavior

The quickstart doesn't correspond to the output of the latest CLI's ng new.

https://angular.io/guide/quickstart

It says "Your app greets you with a message:" with "App Works" in an image box.

The CLI no longer generates "App Works".

Expected behavior

The message in the box should be " Welcome to app!!"

Please tell us about your environment

Angular version: 4.2.4 / 4.4.5
Docs Site Version 4.2.5-build.32090+sha.9344c86.

[Foxandxss]

I will update the quickstart to the latest version which I believe have even a different message.

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