docs(eslint-plugin-react-hooks): clarify config details for prior versions (#32498)

This change adds more details about prior versions of the plugin's
config, to help people as they migrate from legacy to flat configs
across multiple versions of this plugin. At some point in the 6.0 or 7.0
cycle, it would probably make sense to re-consolidate this into a single
version.

Closes #32494

Author: michaelfaith

packages/eslint-plugin-react-hooks/README.md

@@ -20,20 +20,24 @@ yarn add eslint-plugin-react-hooks --dev
 
 ### Flat Config (eslint.config.js|ts)
 
-For [ESLint 9.0.0 and above](https://eslint.org/blog/2024/04/eslint-v9.0.0-released/), add the `recommended` config.
+#### 5.2.0
+
+For users of 5.2.0 (the first version with flat config support), add the `recommended-latest` config.
 
 ```js
 import * as reactHooks from 'eslint-plugin-react-hooks';
 
 export default [
   // ...
-  reactHooks.configs['recommended'],
+  reactHooks.configs['recommended-latest'],
 ];
 ```
 
 ### Legacy Config (.eslintrc)
 
-If you are still using ESLint below 9.0.0, you can use `recommended-legacy` for accessing the recommended config.
+#### >= 5.2.0
+
+If you are still using ESLint below 9.0.0, you can use `recommended-legacy` for accessing a legacy version of the recommended config.
 
 ```js
 {
@@ -44,6 +48,19 @@ If you are still using ESLint below 9.0.0, you can use `recommended-legacy` for
 }
 ```
 
+#### < 5.2.0
+
+If you're using a version earlier than 5.2.0, the legacy config was simply `recommended`.
+
+```js
+{
+  "extends": [
+    // ...
+    "plugin:react-hooks/recommended"
+  ]
+}
+```
+
 ### Custom Configuration
 
 If you want more fine-grained configuration, you can instead add a snippet like this to your ESLint configuration file: