[Sync EN] Add example on updating values with array_walk_recursive. (#3365)

[github-actions]

Commit: https://github.com/php/doc-en/commit/0d8ee2131b4da66a4d274c576da9137c2a7963d5
PR: https://github.com/php/doc-en/pull/3365

Fichiers FR à mettre à jour

• reference/array/functions/array-walk-recursive.xml