chore: reduce hide demo ui

Author: lukepolo

src/spectator/reporters/demo-playing.mjs

@@ -31,7 +31,7 @@ export async function reportDemoPlayingOnce() {
     void execCfgCommand("demoui")
       .catch(() => undefined)
       .finally(() => { playingState.demouiHidden = true; });
-  }, 3000);
+  }, 500);
 
   demoState.paused         = true;
   demoState.lastTickAtSeek = 0;