Added a solidity course (#11461)

courses/free-courses-hi.md

@@ -763,6 +763,7 @@
 
 ### Solidity
 
+* [Solidity ^0.8 \| Blockchain \| In Hindi](https://www.youtube.com/playlist?list=PL-Jc9J83PIiG6_thChXWzolj9BEG-Y0gh) - Pepcoding
 * [Solidity Full Course](https://www.youtube.com/playlist?list=PLgPmWS2dQHW9u6IXZq5t5GMQTpW7JL33i) - Code Eater