fix: update React Native repo URL to new GitHub org

[antonis]

📢 Type of change

• Bugfix
• New feature
• Enhancement
• Refactoring

📜 Description

Updates the React Native repository URL in scripts/update-rn.sh from facebook/react-native to react/react-native following the repo migration.

GitHub auto-redirects work, but the updater workflow should reference the canonical URL.

💡 Motivation and Context

The React Native repository moved to the react GitHub organization as part of the transition to the React Foundation. The old URL still works via redirect, but the dependency updater workflow (Update Dependencies) fetches tags from this repo — using the canonical URL avoids relying on redirects.

Relates to #6267.

💚 How did you test it?

One-line change to a URL, verified the new URL resolves correctly.

📝 Checklist

• I added tests to verify changes
• No new PII added or SDK only sends newly added PII if sendDefaultPII is enabled
• I updated the docs if needed.
• I updated the wizard if needed.
• All tests passing
• No breaking changes

🔮 Next steps

[github-actions]

Semver Impact of This PR

⚪ None (no version bump detected)

📋 Changelog Preview

This is how your changes will appear in the changelog.
Entries from this PR are highlighted with a left border (blockquote style).

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• fix: update React Native repo URL to new GitHub org by antonis in #6290

• test(e2e): Bump E2E tests to React Native 0.86.0 by antonis in #6268
• feat(android): Add nativeStackAndroid support to NativeLinkedErrors by lucas-zimerman in #6278
• chore(deps): bump ruby/setup-ruby from 1.310.0 to 1.313.0 by dependabot in #6282
• chore(deps): update Maestro to v2.6.1 by github-actions in #6277
• chore(deps): bump gradle/actions from 6.1.0 to 6.2.0 by dependabot in #6284
• chore(deps): bump getsentry/craft from 2.26.8 to 2.26.10 by dependabot in #6283
• chore(deps): bump getsentry/craft/.github/workflows/changelog-preview.yml from 2.26.8 to 2.26.10 by dependabot in #6281
• chore(deps): update Sentry Android Gradle Plugin to v6.11.0 by github-actions in #6275
• chore(deps): update Android SDK to v8.43.2 by github-actions in #6273
• chore(deps): bump joi from 17.13.3 to 17.13.4 by dependabot in #6279
• chore(deps): update Cocoa SDK to v9.17.1 by github-actions in #6272
• docs(replay): clarify fast renderer option docs by leohara in #6276
• feat(core): Warn when multiple versions of Sentry JS SDK are detected by antonis in #6269

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