Update free-courses-en.md (#8233)

* Update free-courses-en.md

Added Advanced Coa course by IITD faculty

* Update free-courses-en.md

change video to playlist link

* I remove youtube text

I remove youtube text

* Update free-courses-en.md

I correct the playlist of advanced computer architecture

* Update courses/free-courses-en.md

Co-authored-by: Sharan J <50091666+shrn01@users.noreply.github.com>

Co-authored-by: Sharan J <50091666+shrn01@users.noreply.github.com>

courses/free-courses-en.md

@@ -344,6 +344,7 @@
 
 ### Computer Organization and Architecture
 
+* [Advanced Computer Architecture](https://www.youtube.com/playlist?list=PL1iLu2CSC9EWZMIh4_V5dGroMAwA84Lmz) - Smruti R. Sarangi
 * [Computer Organization & Architecture (COA)](https://www.youtube.com/playlist?list=PLBlnK6fEyqRgLLlzdgiTUKULKJPYc0A4q) - Neso Academy (YouTube)