added yml parameter description

application/src/main/resources/thingsboard.yml

@@ -690,7 +690,7 @@ spring.servlet.multipart.max-request-size: "50MB" # Total request size for a mul
 
 spring.jpa.properties.hibernate.jdbc.lob.non_contextual_creation: "true" #Fix Postgres JPA Error (Method org.postgresql.jdbc.PgConnection.createClob() is not yet implemented)
 spring.jpa.properties.hibernate.order_by.default_null_ordering: "${SPRING_JPA_PROPERTIES_HIBERNATE_ORDER_BY_DEFAULT_NULL_ORDERING:last}" # Note: as for current Spring JPA version, custom NullHandling for the Sort.Order is ignored and this parameter is used
-spring.jpa.properties.hibernate.dialect: "${SPRING_JPA_DIALECT:org.thingsboard.server.dao.ThingsboardPostgreSQLDialect}"
+spring.jpa.properties.hibernate.dialect: "${SPRING_JPA_DIALECT:org.thingsboard.server.dao.ThingsboardPostgreSQLDialect}" # we use custom dialect that contains ilike(arg1, arg2) function (is interpreted to postgres ILIKE operator)
 
 # SQL DAO Configuration
 spring: