[Sync EN] tokens: Add tokens `T_VOID_CAST` and `T_PIPE` (#5038)

[github-actions]

Commit: https://github.com/php/doc-en/commit/5f720ab2b9c8122d1a127684748712fc57a24d06
PR: https://github.com/php/doc-en/pull/5038

Fichiers FR à mettre à jour

• appendices/tokens.xml