Incorrectly formatted links in downstream automatic topic creation doc

A pair of links in Ch. 9.3.2 of the Debezium User guide (topic-auto-create-config.adoc) are incorrectly formatted with the result that the link text is corrupted and one link target is is obscured.

For details about how Kafka Connect matches topics to topic creation groups, see xref:topic-creation-groups[]. // <= Missing link text
For more information about how configuration properties are assigned to groups, see xref:topic-creation-group-configuration-properties[Topic creation group configuration properties].