Update README

Signed-off-by: Isaac Marovitz <isaacryu@icloud.com>

Author: IsaacMarovitz

Readme.md

@@ -1,5 +1,5 @@
 ## FFmpeg builtins
 
-This repository contains the FFmpeg builtins for shadPS4 and the CI to build them using vcpkg and GitHub actions.
+This repository contains the FFmpeg builtins for MarathonRecomp and the CI to build them using vcpkg and GitHub actions.
 
 The Windows version is built using clang-cl, this is done so that inline assembly optimisations (which are not supported by MSVC) can be enabled.