Added OpenCV Tutorial by WsCube Tech (changes made) (#11391)

* Added OpenCV Tutorial by WsCube Tech

* Update free-courses-hi.md

courses/free-courses-hi.md

@@ -663,6 +663,7 @@
 * [Free Python Course For School Students (Grade7-10) Certified Course By Coding Blocks Junior](https://youtube.com/playlist?list=PLhLbJ9UoJCvumawW64knIBSJuHALx3zBE) - Coding Blocks Junior
 * [Full Python Tutorial in Hindi](https://www.youtube.com/playlist?list=PLlgLmuG_KgbZziQYQV1sdhKt-VQHUE_Yl) - Bharani Akella
 * [Intermediate/Advanced python Tutorials in Hindi](https://www.youtube.com/playlist?list=PLu0W_9lII9aiJWQ7VhY712fuimEpQZYp4) - CodeWithHarry
+* [OpenCV Full Tutorial by WsCube Tech](https://www.youtube.com/playlist?list=PLjVLYmrlmjGelmHXLZ0ukHdb-jjvG6rRm) - WsCube Tech
 * [Python](https://www.youtube.com/playlist?list=PLHjOos34ty4GYwKO-CFTdJKfVNd50tajF) - Computer Gyan Guruji
 * [Python For Beginners](https://youtube.com/playlist?list=PL-5gYa7CLd4iBdPHRaSEwbivCnUq1nxj9) - Technical Sagar
 * [Python for Data Science for Absolute Beginners (Full Course)](https://www.youtube.com/playlist?list=PL1gztxnUtwNfnR0jYniFM5E6HwcQMnFmx) - Data is Good