Added two Electronjs courses Resolves #5928 (#5939)

* Added two Electronjs courses Resolves #5928

* updated links and category

courses/free-courses-en.md

@@ -31,6 +31,7 @@
 * [JavaScript](#javascript)
   * [AngularJS](#angularjs)
   * [D3.js](#d3js)
+  * [Electron](#electron)
   * [jQuery](#jquery)
   * [Next.js](#nextjs)
   * [NodeJS](#nodejs)
@@ -460,6 +461,12 @@
 * [Learn D3](https://www.codecademy.com/learn/learn-d3) - Codecademy *(account required)*
 
 
+#### Electron
+
+* [Electron Js - Build real desktop apps](https://youtube.com/playlist?list=PLtWy6rdN1yBntIyLeNo-fCVR6AaK7vdyl) - Vishwas Gopinath, How To Code (YouTube)
+* [Electron js Tutorials](https://youtube.com/playlist?list=PLC3y8-rFHvwiCJD3WrAFUrIMkGVDE0uqW) - Codevolution (YouTube)
+
+
 #### jQuery
 
 * [Bento jQuery Track](https://bento.io/topic/jquery) (Bento)