[Bug]: Runtime error in new `useEffectEvent` example

### Summary

When I scroll down to the example on how to use `useEffectEvent` there is a runtime error and I can't see the example in action.

### Page

https://react.dev/learn/separating-events-from-effects#extracting-non-reactive-logic-out-of-effects

### Details

<img width="1212" height="530" alt="Image" src="https://github.com/user-attachments/assets/976448bf-72d2-4bce-b2f2-a13325a0268b" />