Update tooling/hibernate-gradle-plugin/README.adoc

Author: yrodiere

tooling/hibernate-gradle-plugin/README.adoc

@@ -36,7 +36,7 @@ useSameVersion:: Specifies whether to have the plugin inject an `implementation`
 sourceSet:: The source-set containing the project's domain model.  Only one source-set is supported, although all languages (Java, Kotlin, etc)
     within that source-set are considered.
 
-It additionally defines 3 nested DSL extensions related to:
+It additionally defines 2 nested DSL extensions related to:
 
 * <<enhance>>
 * <<hbm-xml>>