Update README.md

Author: simpletut

README.md

@@ -28,30 +28,27 @@ Add `Calendar` to your component:
 
 ```js
 import React from 'react'
-import ReactDOM from 'react-dom/client'
 import Calendar from 'reactjs-availability-calendar'
 
-const bookings = [
-  {
-    from: '01-08-2022',
-    to: '01-16-2022',
-    middayCheckout: true,
-  },
-  {
-    from: '06-25-2022',
-    to: '07-03-2022',
-    middayCheckout: false,
-  },
-]
-
-const root = ReactDOM.createRoot(document.getElementById('root') as HTMLElement)
-root.render(
-  <React.StrictMode>
-    <div className='demo'>
-      <Calendar bookings={bookings} />
-    </div>
-  </React.StrictMode>,
-)
+export default function App() {
+  const bookings = [
+    {
+      from: '01-08-2022',
+      to: '01-16-2022',
+      middayCheckout: true,
+    },
+    {
+      from: '06-25-2022',
+      to: '07-03-2022',
+      middayCheckout: false,
+    },
+  ]
+
+  return (
+    <Calendar bookings={bookings} />
+  )
+}
+
 
 ```