Convert Readme.rst to Readme.md (ivy-llc#20868)

Co-authored-by: Kareem Morsy <[email protected]>

Author: sladyn98

.github/CODEOWNERS

@@ -23,4 +23,4 @@ docker/* @ricksanchezstoic
 .idea/* @Aarsh2001 @zaeemansari70
 
 # README
-README.rst @guillesanbri
+README.md @guillesanbri