📝 update Readme usage example (#277)

Author: KRRISH96

README.md

@@ -70,16 +70,17 @@ In your `App.js` :
 ```jsx
 import React from 'react';
 import ReactDOM from 'react-dom';
-import { Carousel } from 'react-lite-ui';
+import { Card } from 'react-lite-ui';
 
 class App extends React.Component {
       render() {
-        const data = [
-          "https://images.pexels.com/photos/371633/pexels-photo-371633.jpeg?cs=srgb&dl=wood-landscape-sky-371633.jpg&fm=jpg",
-          "https://hanslodge.com/images/pTqrL9Rec.jpg",
-          "https://images.pexels.com/photos/248797/pexels-photo-248797.jpeg?cs=srgb&dl=sea-landscape-nature-248797.jpg&fm=jpg"
-        ];
-        return <Carousel data={data} theme={componentTheme} />;
+        return (
+          <Card
+            header="Card header"
+          >
+            Card content
+          </Card>
+        );
       }
     }