Add DenoJS section and a free Deno Beginner Course (#4695)

* Add DenoJS Beginner Course

Add DenoJS section and a free Deno Beginner Course

* fix the order

* fix CI lint error

* Add author name and email required

* Fix formatting for the required field

free-courses-en.md

@@ -26,6 +26,7 @@
 * [Java](#java)
 * [JavaScript](#javascript)
   * [Angular.js](#angularjs)
+  * [DenoJS](#denojs)
   * [jQuery](#jquery)
   * [Next.js](#nextjs)
   * [NodeJS](#nodejs)
@@ -322,6 +323,11 @@
 * [Shaping up with Angular.js](https://www.codeschool.com/courses/shaping-up-with-angular-js)
 
 
+#### DenoJS
+
+* [Deno Beginner](https://denobeginner.com) - Ahmad Awais - _Email required_
+
+
 #### jQuery
 
 * [Bento jQuery Track](https://bento.io/topic/jquery) (Bento)