Error in deprecation text

The README file for this project starts with a text explaining that the Antora Xref Validator is obsolete and what to use instead. This text states:

If there are xref validation errors, you can configure Antora to exit with a non-zero exit code by setting the log severity level to ERROR (or WARN) (e.g., --log-level=error).

This isn't correct. Setting the log severity level (--log-level) only affects which log messages are printed, not which log messages result in a non-zero exit code. This should be the log failure level (log-failure-level).