Update free-courses-hi.md (#10767)

* Update free-courses-hi.md

* Update free-courses-hi.md

* Update free-courses-hi.md

* Update free-courses-hi.md

Solved : Incorrect number of blank lines between heading and section

courses/free-courses-hi.md

@@ -50,6 +50,7 @@
 * [Mongo DB](#mongo-db)
 * [Natural Language Processing](#natural-language-processing)
 * [Networking](#networking)
+* [Open Source](#open-source)
 * [Operating Systems](#operating-systems)
 * [PHP](#php)
     * [CodeIgniter](#codeigniter)
@@ -569,6 +570,11 @@
 * [Networking Basics](https://www.youtube.com/playlist?list=PLkW9FMxqUvyZaSQNQslneeODER3bJCb2K) - Bitten Tech
 
 
+### Open Source
+
+* [Open Source BootCamp - Master Open Source Contributions](https://www.youtube.com/playlist?list=PLinedj3B30sAT6CotNj0iffhRV89SkNK9) - Piyush Garg
+
+
 ### Operating Systems
 
 * [3.2 Operating System (Complete Playlist)](https://www.youtube.com/playlist?list=PLmXKhU9FNesSFvj6gASuWmQd23Ul5omtD) - Knowledge Gate