fix: display alert timeout in story

stories/useLatest.story.tsx

@@ -6,18 +6,19 @@ import ShowDocs from './util/ShowDocs';
 const Demo = () => {
   const [count, setCount] = React.useState(0);
   const latestCount = useLatest(count);
+  const timeoutMs = 3000;
 
   function handleAlertClick() {
     setTimeout(() => {
       alert(`Latest count value: ${latestCount.current}`);
-    }, 3000);
+    }, timeoutMs);
   }
 
   return (
     <div>
       <p>You clicked {count} times</p>
       <button onClick={() => setCount(count + 1)}>Click me</button>
-      <button onClick={handleAlertClick}>Show alert</button>
+      <button onClick={handleAlertClick}>Show alert in {timeoutMs / 1000}s</button>
     </div>
   );
 };