Added Build a Quiz App with HTML, CSS, and JavaScript (#7870)

* added Build a Quiz App with HTML, CSS, and JavaScript

* deleted duplicate

* fixed ordering

Co-authored-by: Stepan Naryshkov <snaryshkov@microsoft.com>

courses/free-courses-en.md

@@ -539,6 +539,7 @@
 * [Bento CSS Learning Track](https://bento.io/topic/css) (Bento)
 * [Bento HTML Learning Track](https://bento.io/topic/html) (Bento)
 * [Build a Personal Website with Dash](https://dash.generalassemb.ly)
+* [Build a Quiz App with HTML, CSS, and JavaScript](https://www.udemy.com/course/build-a-quiz-app-with-html-css-and-javascript) - James Quick (Udemy)
 * [Build a responsive website with Webflow](https://www.bloc.io/tutorials/webflow-tutorial-design-responsive-sites-with-webflow)
 * [Build a SaaS landing page using Skeleton](https://www.bloc.io/tutorials/jottly-a-beginner-s-guide-to-html-css-skeleton-and-animate-css)
 * [Build Dynamic Websites](https://web.archive.org/web/20210812200413/http://cs75.tv/2010/fall/) - David J. Malan [(YouTube)](https://www.youtube.com/playlist?list=PLvJoKWRPIu8GhAhDBAH0BFB9BS7YxM1WT)