Fix #14566, image in second code sample not rendering

Summary:
Fixes #14566, as suggested by hramos. Only change from our convo is that I set the height to 180 in this pull request instead of 240. This to respect the aspect ratio of the source image.

- run website, visit in browser, verify that second example code section renders correctly
- copy and paste example code of second example into the App.js of a freshly created react native app
- prepend "export default" to line 4 of the pasted code
- run the app for ios or android (npm start ios)
- verify that the image of that terrible high-five actually renders in the app now

Closes https://github.com/facebook/react-native/pull/14571

Differential Revision: D5330093

Pulled By: hramos

fbshipit-source-id: a0afcd16d07ac25080af41f9619df0703f11b152

website/src/react-native/index.js

@@ -95,7 +95,10 @@ class AwkwardScrollingImageWithText extends Component {
   render() {
     return (
       <ScrollView>
-        <Image source={{uri: 'https://i.chzbgr.com/full/7345954048/h7E2C65F9/'}} />
+        <Image
+          source={{uri: 'https://i.chzbgr.com/full/7345954048/h7E2C65F9/'}}
+          style={{width: 320, height:180}}
+        />
         <Text>
           On iOS, a React Native ScrollView uses a native UIScrollView.
           On Android, it uses a native ScrollView.