Add MIT Deep Learning course, check_urls=free-courses-en.md (#5101)

* Add MIT Deep Learning course, check_urls=free-courses-en.md

* Edit link

free-courses-en.md

@@ -248,6 +248,7 @@
 * [Intro to Deep Learning](https://www.kaggle.com/learn/intro-to-deep-learning) - Ryan Holbrook
 * [Introduction to Reinforcement learning with David Silver](https://www.youtube.com/playlist?list=PLqYmG7hTraZBiG_XpjnPrSNw-1XQaM_gB) - David Silver
 * [MIT 6.S094: Deep Learning for Self-Driving Cars](https://selfdrivingcars.mit.edu)
+* [MIT 6.S191: Introduction to Deep Learning](http://introtodeeplearning.com) - Alexander Amini, Ava Soleimany
 * [Practical Deep Learning For Coders taught](http://www.fast.ai) - Jeremy Howard
 * [Practical Deep Learning for Coders, v3 (using fastai library)](https://course.fast.ai)
 * [Self-Paced Courses for Deep Learning](https://developer.nvidia.com/deep-learning-courses)