mention 'org.hibernate.orm:hibernate-hikaricp' in doc

Author: gavinking

documentation/src/main/asciidoc/introduction/Tuning.adoc

@@ -93,6 +93,7 @@ The following settings are common to all connection pools supported by Hibernate
 |===
 
 A popular alternative to Agroal is HikariCP.
+Integration with HikariCP is provided by the module `org.hibernate.orm:hibernate-hikaricp`.
 Its settings are enumerated by link:{doc-javadoc-url}/org/hibernate/cfg/HikariCPSettings.html[`HikariCPSettings`].
 
 .Container-managed datasources