fix: update React Native repo URL to new GitHub org (#6290)

The React Native repository moved from facebook/react-native to
react/react-native. GitHub auto-redirects work but the updater
workflow should reference the canonical URL.

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Author: antonis

scripts/update-rn.sh

@@ -2,7 +2,7 @@
 set -euo pipefail
 
 tagPrefix='v' # wizard has a prefix in the repo, but the package.json doesn't have that - we must align
-repo="https://github.com/facebook/react-native.git"
+repo="https://github.com/react/react-native.git"
 packages=('react-native')
 
 . $(dirname "$0")/update-package-json.sh