Adding free resource (course) for Artificial Intelligence. (#11384)

* Update free-courses-en.md

added a free resource for artificial intelligence provided by IIT Bombay and several other industry collaborators.

* Update free-courses-en.md

courses/free-courses-en.md

@@ -268,6 +268,7 @@
 * [Artificial Intelligence Search Methods For Problem Solving](https://www.youtube.com/playlist?list=PLbMVogVj5nJSFZoiF6RDqyz_m6Srjx_MY) - nptelhrd
 * [CS50’s Introduction to Artificial Intelligence with Python](https://cs50.harvard.edu/ai/) - Brian Yu, David J. Malan (Harvard OpenCourseWare and edX)
 * [Elements of AI](https://www.elementsofai.com) - University of Helsinki, Reaktor
+* [Have fun Staying Home And Learning AI - SHALA2020](https://shala2020.github.io) - IIT BOMBAY
 * [IBM AI Engineering Professional Certificate](https://www.coursera.org/professional-certificates/ai-engineer) - Romeo Kienzler, Saeed Aghabozorgi, Joseph Santarcangelo, Alex Aklson et al. (Coursera)
 * [Introduction to TensorFlow for Artificial Intelligence, Machine Learning, and Deep Learning](https://www.coursera.org/learn/introduction-tensorflow) - DeepLearning.ai (Coursera)
 * [MIT Deep Learning and Artificial Intelligence Lectures](https://deeplearning.mit.edu) - Lex Fridman, et al.