Added Linked List by Pepcoding (#10364)

* Added Linked List by Pepcoding

* Removed Dot Files

courses/free-courses-hi.md

@@ -80,6 +80,7 @@
 * [Dynamic Programming Workshop](https://www.youtube.com/playlist?list=PLqf9emQRQrnKA_EeveiXQj_uP25w8_5qL) - Vivek Gupta
 * [Generic Trees - Level 1](https://www.youtube.com/playlist?list=PL-Jc9J83PIiEmjuIVDrwR9h5i9TT2CEU_) - Pepcoding
 * [Graphs - Level 1](https://www.youtube.com/playlist?list=PL-Jc9J83PIiHfqDcLZMcO9SsUDY4S3a-v) - Pepcoding
+* [Linked List - Level 1](https://youtube.com/playlist?list=PL-Jc9J83PIiF5VZmktfqW6WVU1pxBF6l_&si=S_MRPF7yyupBUCC6) - Pepcoding
 * [Recursion & Backtracking - Level 1](https://www.youtube.com/playlist?list=PL-Jc9J83PIiFxaBahjslhBD1LiJAV7nKs) - Pepcoding
 * [Recursion & Backtracking - Level 2](https://www.youtube.com/playlist?list=PL-Jc9J83PIiHO9SQ6lxGuDsZNt2mkHEn0) - Pepcoding
 * [Recursion Playlist \| Coding \| Interview Questions \| Algorithm \| Tutorials](https://www.youtube.com/playlist?list=PL_z_8CaSLPWeT1ffjiImo0sYTcnLzo-wY) - Aditya Verma