Update readme

Author: jvisser

README.md

@@ -9,7 +9,8 @@ Golden Axe 32X conversion patch for the original Sega Mega Drive game.
   - SHA256: `e9f5340ecf8151253eb6fcda136c4d4d8940e373340ce2eeb2bf24f9f6c1004d`
 - `jdk 17+`: To build and run the tools
 - `maven 3+`: To build the tools
-- [`marsdev`](https://github.com/andwn/marsdev): To build the patch file
+- [`marsdev`](https://github.com/andwn/marsdev): To build the patch file. 
+  - Version [`2022.02`](https://github.com/andwn/marsdev/releases/tag/2022.02) was used. This still included the [`mdcomp`](https://github.com/flamewing/mdcomp) tools which are required.
 
 #### Optional
 - [`flips`](https://github.com/Alcaro/Flips): To apply the patch file