[Sync EN] Sync enums with the stubs

PR: `https://github.com/php/doc-en/pull/5443` (2026-04-01)

**Файлы RU для обновления**
- `reference/math/roundingmode.xml`
- `reference/pcntl/pcntl.qosclass.xml`
- `reference/random/random.intervalboundary.xml`
- `reference/reflection/propertyhooktype.xml`

