[Sync EN] Declare the namespace of ext/random classes

[github-actions]

PR: https://github.com/php/doc-en/pull/5394 (2026-02-28)

Файлы RU для обновления

• reference/random/random.brokenrandomengineerror.xml
• reference/random/random.cryptosafeengine.xml
• reference/random/random.engine.mt19937.xml
• reference/random/random.engine.pcgoneseq128xslrr64.xml
• reference/random/random.engine.secure.xml
• reference/random/random.engine.xml
• reference/random/random.engine.xoshiro256starstar.xml
• reference/random/random.randomerror.xml
• reference/random/random.randomexception.xml
• reference/random/random.randomizer.xml

[lacatoire]

already done here

[saundefined]

Applied with 0727946