Update free-courses-hi.md (#8426)

Added a youtube tutorial on R programming language.

courses/free-courses-hi.md

@@ -410,6 +410,7 @@
 
 ### R
 
+* [Complete R Programming Tutorial for Beginners to Pro [HINDI]](https://www.youtube.com/playlist?list=PLjVLYmrlmjGdmPrz0Lx7smkd0qIKHInOF) - WsCube Tech
 * [R Programming](https://www.youtube.com/playlist?list=PLWPirh4EWFpEvN4ktS8LE0cvLCSfhD55t) (Tutorials Point (India) Ltd.)