Added Data Structure Course (#9974)

* Added Data Structure Course

* Modified Title

courses/free-courses-hi.md

@@ -206,6 +206,7 @@
 * [Heap Playlist Interview Questions Coding Tutorials Data Structures](https://youtube.com/playlist?list=PL_z_8CaSLPWdtY9W22VjnPxG30CXNZpI9) - Aditya Verma 
 * [Java + Data Structures + Algorithms](https://www.youtube.com/playlist?list=PLKKfKV1b9e8ps6dD3QA5KFfHdiWj9cB1s) - Apni Kaksha
 * [Java + DSA](https://www.youtube.com/playlist?list=PLfqMhTWNBTe3LtFWcvwpqTkUSlB32kJop) - Apna College
+* [Java + DSA + Interview Preparation Course](https://youtube.com/playlist?list=PL9gnSGHSqcnr_DxHsP7AW9ftq0AtAyYqJ) - Kunal Kushwaha
 * [Linked Lists - Level 1](https://www.youtube.com/playlist?list=PL-Jc9J83PIiF5VZmktfqW6WVU1pxBF6l_) - Pepcoding
 * [Simplified DSA with FRAZ](https://www.youtube.com/playlist?list=PLKZaSt2df1gy75J3irj89a2vSGqeQdtDA) - Fraz
 * [Stack Playlist \| Interview Questions \| Coding \| Tutorials \| Data Structures](https://www.youtube.com/playlist?list=PL_z_8CaSLPWdeOezg68SKkeLN4-T_jNHd) - Aditya Verma