added a course in intro to machine learning in free-courses-hi.md (#7321)

* added a course in intro to machine learning

* added a course in machine learning in free-courses-hi.md and removed extra blank line

courses/free-courses-hi.md

@@ -217,6 +217,7 @@
 
 ### Machine Learning
 
+* [Intro to Machine Learning](https://www.youtube.com/playlist?list=PL-Jc9J83PIiHioMKxmCxzpXdNfLE4TVjD) - Pepcoding (YouTube)
 * [Machine Learning Full Course](https://www.youtube.com/watch?v=IoZGSQ07e8g) - Bharani Akella, Great Learning (YouTube)
 * [Machine Learning in Hindi](https://www.youtube.com/playlist?list=PLPbgcxheSpE0aBsefANDYe2X_-tyJbBMr) - Codebasics Hindi
 * [Machine Learning Tutorials For Beginners Using Python in Hindi](https://www.youtube.com/playlist?list=PLu0W_9lII9ai6fAMHp-acBmJONT7Y4BSG) - CodeWithHarry (YouTube)