added JSON.stringify to hotel orders

Author: darseen

src/amadeus/namespaces/booking/hotel_orders.js

@@ -26,20 +26,20 @@ class HotelOrders {
    *
    * ```js
    * amadeus.booking.hotelOrders.post(
-   * JSON.stringfy({
+   * {
    * 'data': {
    *     'type': 'hotel-order',
    *     'guests': [],
    *     'travelAgent': {},
    *     'roomAssociations': [],
    *     'payment': {}
-   * }})
-   *)
+   *   }
+   * })
    * ```
+
    */
   post(params = {}) {
-
-    return this.client.post('/v2/booking/hotel-orders', params);
+    return this.client.post('/v2/booking/hotel-orders', JSON.stringify(params));
   }
 }