[Sync EN] POSIX: add changelog entries for PHP 8.5 changes (#5534)

[github-actions]

Commit: https://github.com/php/doc-en/commit/42ed815ea41bc1ceb3c1417e1aa8778d327e314a
PR: https://github.com/php/doc-en/pull/5534

Fichiers FR à mettre à jour

• reference/posix/functions/posix-fpathconf.xml
• reference/posix/functions/posix-isatty.xml
• reference/posix/functions/posix-kill.xml
• reference/posix/functions/posix-setpgid.xml
• reference/posix/functions/posix-setrlimit.xml
• reference/posix/functions/posix-ttyname.xml