Userland/tt: Switch to MiB

Author: https://github.com/nico
Commit: 1e2dc736e3
Pull-request: https://github.com/SerenityOS/serenity/pull/3164
Reviewed-by: https://github.com/Dexesttp
Reviewed-by: https://github.com/alimpfard

Userland/tt.cpp

@@ -261,7 +261,7 @@ int stack_size_test()
         printf("pthread_attr_setstacksize: %s\n", strerror(rc));
         return 3;
     }
-    printf("Set thread stack size to 8 MB\n");
+    printf("Set thread stack size to 8 MiB\n");
 
     pthread_t thread_id;
     rc = pthread_create(