HHH-9990 - updated migration guide to reflect the changes

Author: dreab8

migration-guide-5.0.adoc

@@ -23,4 +23,6 @@ to `org.hibernate.boot.model.TypeContributor` and `org.hibernate.boot.model.Type
 ** entity simple identifier column - JPA defaults
 ** entity version - currently uses #determineAttributeColumnName
 ** collection-id column name - currently hard-coded as "id"
-** list-index column name - currently hard-coded as "idx"
+** list-index column name - currently hard-coded as "idx"
+
+* hibernate.jdbc.batch_versioned_data default value is true, oracle dialect set this propety to false excoet for Oracle12cDialect