Added Git and Github course (#3023)

* Added Git and Github course

* Ordering the list alphabetically

free-courses-en.md

@@ -158,6 +158,7 @@
 
 * [Bento Git Learning Track](https://bento.io/topic/git) (Bento)
 * [Bento GitHub Learning Track](https://bento.io/topic/github) (Bento)
+* [Git and GitHub for Poets](https://www.youtube.com/playlist?list=PLRqwX-V7Uu6ZF9C0YMKuns9sLDzK6zoiV)
 * [How to Use Git and GitHub](https://www.udacity.com/course/how-to-use-git-and-github--ud775) (Udacity)