Improved variable naming in Readme.md (chirag04#184)

* Improved variable naming in Readme.md

Also added a console.log line just to help people know what should be happening

* Might as well make it const not var

Author: philwilks

Readme.md

@@ -34,10 +34,11 @@ const { InAppUtils } = NativeModules
 You have to load the products first to get the correctly internationalized name and price in the correct currency.
 
 ```javascript
-var products = [
+const identifiers = [
    'com.xyz.abc',
 ];
-InAppUtils.loadProducts(products, (error, products) => {
+InAppUtils.loadProducts(identifiers, (error, products) => {
+   console.log(products);
    //update store here.
 });
 ```