Update free-courses-hi.md (#8308)

Added an angular course playlist

courses/free-courses-hi.md

@@ -77,6 +77,7 @@
 
 ### Angular 
 
+* [Angular 12 - 13 tutorial in Hindi](https://www.youtube.com/playlist?list=PL8p2I9GklV45--5t7_N4lveUI6Y31vQ6C) - Code Step By Step
 * [Learn Angular in one video (Hindi)](https://www.youtube.com/watch?v=0LhBvp8qpro&list=PLu0W_9lII9ahKZ42vg2w9ERPmShYbYAB7&index=21) - Code With Harry