[Sync EN] Fix exception name in createFromDateString documentation (#5521)

[github-actions]

Commit: https://github.com/php/doc-en/commit/c0c9d7721b5a8564a4e27671389a456c1be13e6b
PR: https://github.com/php/doc-en/pull/5521

Fichiers FR à mettre à jour

• reference/datetime/dateinterval/createfromdatestring.xml