[Sync EN] Add PHP 8.5.0 deprecation changelog entries

[github-actions]

PR: https://github.com/php/doc-en/pull/5369 (2026-05-18)

Файлы RU для обновления

• reference/fileinfo/functions/finfo-buffer.xml
• reference/reflection/reflectionclass/getconstant.xml
• reference/reflection/reflectionmethod/setaccessible.xml
• reference/reflection/reflectionproperty/getdefaultvalue.xml
• reference/reflection/reflectionproperty/setaccessible.xml
• reference/spl/functions/spl-autoload-unregister.xml
• reference/spl/splobjectstorage/attach.xml
• reference/spl/splobjectstorage/contains.xml
• reference/spl/splobjectstorage/detach.xml
• reference/strings/functions/chr.xml
• reference/strings/functions/ord.xml