[Typo]: `useOptimistic` is missing from Hooks reference page

Summary

The useOptimistic hook is listed in the left navigation menu but is missing from the Built-in React Hooks overview page, leaving the page incomplete with only 17 of the 18 hooks documented.

Page

https://react.dev/reference/react/hooks

Details

Description

The left navigation menu under Hooks lists 18 hooks, but the Built-in React Hooks overview page only documents 17 of them. useOptimistic is present in the sidebar but not mentioned anywhere on the overview page.

Steps to reproduce

1. Open https://react.dev/reference/react/hooks
2. Count the hooks documented on the page
3. Compare with the hooks listed in the left navigation menu under Hooks

Expected

useOptimistic should be listed in the State Hooks section of the overview page, alongside useState and useReducer, since it lets you show a different state while an async action is pending.

Actual

useOptimistic is missing from the overview page entirely.

Suggested fix

Add useOptimistic to the State Hooks section in src/content/reference/react/hooks.md:

• useOptimistic lets you show a different state while an async action is pending.

Screen Capture

Additional Context:

The overview page is often the first place developers look when exploring React's built-in hooks. Having useOptimistic absent from this page means:

• Developers new to React may not discover it exists at all, since the overview page is designed to be the exhaustive entry point for all built-in hooks.
• It creates an inconsistency between the sidebar navigation and the page content
• useOptimistic is particularly relevant in modern React apps that use Server Actions and async transitions — a growing pattern — so its visibility on the overview page is especially valuable for developers adopting these features.

src/content/reference/react/hooks.md から始めて、State Hooks セクションを確認し、Hooks ナビゲーションおよび useOptimistic リファレンスページと比較してください。概要に 18 個すべてのフックが一覧表示され、新しいエントリが記載された説明とともに /reference/react/useOptimistic にリンクしていることを確認してください。