fix(runtime): add missing break after JakX goal_main (#4356)

(AI assisted)

game/runtime.cpp

@@ -239,6 +239,7 @@ void ee_runner(SystemThreadInterface& iface) {
       break;
     case GameVersion::JakX:
       jakx::goal_main(g_argc, g_argv);
+      break;
     default:
       ASSERT_MSG(false, "Unsupported game version");
   }