[Sync EN] ext/reflection: Document ReflectionProperty::getMangledName() (PHP 8.5) (#5693)

[github-actions]

Commit: https://github.com/php/doc-en/commit/844a420240e6944d391d6ae022af239c4961ed04
PR: https://github.com/php/doc-en/pull/5693

Neue EN-Dateien (noch nicht übersetzt)

• reference/reflection/reflectionproperty/getmangledname.xml