docs: update stale facebook/react-native links in package READMEs (#59458)

Summary:
Two package READMEs still link to \github.com/facebook/react-native\ while their own \package.json\ files already reference \github.com/react/react-native\. This makes the READMEs consistent with their package metadata.

Packages updated:
- \react-native/eslint-plugin\: link to \react-native/eslint-config\ package
- \react-native/dev-middleware\: link to \react-native/community-cli-plugin\ package

Historical issue links, version-pinned links, and clone URLs were intentionally left unchanged.

Pull Request resolved: #59458

Test Plan:
Documentation-only change. No behavior change.

## Changelog

[INTERNAL] [CHANGED] - Update stale github.com/facebook/react-native links to github.com/react/react-native in eslint-plugin and dev-middleware READMEs

Reviewed By: christophpurrer

Differential Revision: D127597755

Pulled By: vzaidman

fbshipit-source-id: 8379964fef0b547413bcbb5a79fbf819c484080e

Author: itzsamdev

packages/dev-middleware/README.md

@@ -40,7 +40,7 @@ function myDevServerImpl(args) {
 
 ## Included middleware
 
-`@react-native/dev-middleware` is designed for integrators such as [`@expo/dev-server`](https://www.npmjs.com/package/@expo/dev-server) and [`@react-native/community-cli-plugin`](https://github.com/facebook/react-native/tree/main/packages/community-cli-plugin). It provides a common default implementation for core React Native dev server responsibilities.
+`@react-native/dev-middleware` is designed for integrators such as [`@expo/dev-server`](https://www.npmjs.com/package/@expo/dev-server) and [`@react-native/community-cli-plugin`](https://github.com/react/react-native/tree/main/packages/community-cli-plugin). It provides a common default implementation for core React Native dev server responsibilities.
 
 We intend to keep this to a narrow set of functionality, based around:
 

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

@@ -5,7 +5,7 @@
 [npm]: https://img.shields.io/npm/v/@react-native/eslint-plugin.svg?color=blue
 [npm downloads]: https://img.shields.io/npm/dm/@react-native/eslint-plugin.svg
 
-ESLint rules for [`@react-native/eslint-config`](https://github.com/facebook/react-native/tree/HEAD/packages/eslint-config-react-native). You probably want to install that package instead.
+ESLint rules for [`@react-native/eslint-config`](https://github.com/react/react-native/tree/HEAD/packages/eslint-config-react-native). You probably want to install that package instead.
 
 ## Rules