Make impossible time trial save screen message less verbose

Ally asked me why it was so verbose, and recommended wording it like
this instead. Not that it should matter much, since it _is_ impossible,
but...

desktop_version/src/Render.cpp

@@ -2499,7 +2499,7 @@ void maprender(void)
         }
         if (game.intimetrial)
         {
-            graphics.Print(0, 115, "How did you get on this screen?", 146, 146, 180, true);
+            graphics.Print(0, 115, "How'd you get here?", 146, 146, 180, true);
             break;
         }
         if (game.insecretlab)