[Sync EN] appendix 8.4 property hooks: improve terminology (#4688)

[github-actions]

Commit: https://github.com/php/doc-en/commit/d7efc67559999c1dda0f65c90617b60c6872a61b
PR: https://github.com/php/doc-en/pull/4688

Archivos ES a actualizar

• appendices/migration84/new-features.xml