[Sync EN] Example emits warning unrelated to content (#5747)

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Commit: https://github.com/php/doc-en/commit/e7ec2928daf49d50796dfe74d106eb1068a1c72b
PR: https://github.com/php/doc-en/pull/5747

Zu aktualisierende DE-Dateien

• language/basic-syntax.xml