Missed xref

Author: kbatuigas

modules/develop/pages/transactions.adoc

@@ -25,7 +25,7 @@ endif::[]
 
 == Use transactions
 
-By default, the `enable_transactions` cluster configuration property is set to true. However, in the following use cases, clients must explicitly use the Transactions API to perform operations within a transaction:
+By default, the config_ref:enable_transactions,true,properties/cluster-properties[`enable_transactions`] cluster configuration property is set to true. However, in the following use cases, clients must explicitly use the Transactions API to perform operations within a transaction:
 
 * xref:develop:transactions.adoc#atomic-publishing-of-multiple-messages[Atomic (all or nothing) publishing of multiple messages]
 * xref:develop:transactions.adoc#exactly-once-stream-processing[Exactly-once stream processing]