Update missing closed brace to the insert.CSS (#568)

Author: mosabab

README.md

@@ -621,7 +621,7 @@ function loadStopCallBack() {
 
     if (inAppBrowserRef != undefined) {
 
-        inAppBrowserRef.insertCSS({ code: "body{font-size: 25px;" });
+        inAppBrowserRef.insertCSS({ code: "body{font-size: 25px;}" });
 
         $('#status-message').text("");