[Sync EN] isrighttoleft.xml Add the `<?php` tag (#5514)

[github-actions]

Commit: https://github.com/php/doc-en/commit/facf6996ca5a6057f7092761079e4aa00c5b7713
PR: https://github.com/php/doc-en/pull/5514

Fichiers FR à mettre à jour

• reference/intl/locale/isrighttoleft.xml