Clarify a step in the quick start

I propose to add a sentence to indicate the page is ready, and the next step (Separate File) is optional. IMMO, the quick-start guide should be really short so that readers can see the result asap. Furthermore, the "Separate File" might not work for readers using Chrome anyway.

docs/getting-started.md

@@ -89,7 +89,7 @@ In the root directory of the starter kit, create a `helloworld.html` with the fo
 </html>
 ```
 
-The XML syntax inside of JavaScript is called JSX; check out the [JSX syntax](/react/docs/jsx-in-depth.html) to learn more about it. In order to translate it to vanilla JavaScript we use `<script type="text/babel">` and include Babel to actually perform the transformation in the browser.
+The XML syntax inside of JavaScript is called JSX; check out the [JSX syntax](/react/docs/jsx-in-depth.html) to learn more about it. In order to translate it to vanilla JavaScript we use `<script type="text/babel">` and include Babel to actually perform the transformation in the browser. Open the html from a browser and you should already be able to see the greeting!
 
 ### Separate File