Update Quick Start Guide output example

In the [Quick Start Guide](https://guides.emberjs.com/release/getting-started/quick-start/), under **Create a New Application** section, the output example can be updated to reflect the current version and be consistent with other guides. Currently, in the guide the output shows:
```
Livereload server on http://localhost:7020
Serving on http://localhost:4200/
```
The line `Livereload server on http://localhost:7020` does not look applicable in the current version.

Also, the [Orientation Guide](https://guides.emberjs.com/release/tutorial/part-1/orientation/) in the **Starting and Stopping the Development Server** section reflects the current version better. For reference, the Orientation guide looks like this:
```
$ npm start

> super-rentals@0.0.0 start
> ember serve

building...

Build successful (9761ms) – Serving on http://localhost:4200/
```
Recommend updating the Quick Start Guide to be more consistent with the Orientation Guide and the current version. In the Quick Start Guide, the output can be updated to:
```
$ npm start

> ember-quickstart@0.0.0 start
> ember serve

building...

Build successful (9761ms) – Serving on http://localhost:4200/
```

I would like to create a pull request for this change on the guide if needed.