2006/monge requires x86/x86_64 CPUs

The segfault I noted in c40a061a2d appears
to be because it requires x86/x86_64 architecture and I tested it on the
arm64 (MacBook Pro M1). I will still in time test it under linux to make
sure it works but that's for another time.

With this in mind the entry should at least theoretically work at least
if you have an x86/x86_64 CPU.

2006/monge/README.md

@@ -21,8 +21,8 @@ without SDL1 (**not** SDL2) this will not link because two functions that are
 used were removed from SDL2. Since SDL1 is still available and since changing
 the code to use SDL2 would be more complicated he decided to change the Makefile
 to use `sdl-config` not `sdl2-config`. Nevertheless he points out that the entry
-segfaults or at least it does under macOS (he has not tested linux yet but will
-in time and then try debugging it). Thank you Cody for your assistance!
+requires x86/x86_64 CPUs. Without it it might very well segfault (for instance
+it segfaulted on his MacBook Pro with the M1 chip).
 
 
 ### To run: