[Sync EN] ext/mysqli: Note MYSQLI_TYPE_VECTOR is available as of 8.4.0 (MySQL 9) (#5770)

[github-actions]

Commit: https://github.com/php/doc-en/commit/59fd8de0f80a3e4b3d2bc40b91593f70b222a20a
PR: https://github.com/php/doc-en/pull/5770

Archivos ES a actualizar

• reference/mysqli/constants.xml