Update javadoc links.

This fixes javadoc links in a couple of adoc files.

Original pull request: #3260

Signed-off-by: Tran Ngoc Nhan <ngocnhan.tran1996@gmail.com>
(cherry picked from commit af10ad3)

Author: ngocnhan-tran1996

src/main/antora/modules/ROOT/pages/is-new-state-detection.adoc

@@ -18,7 +18,7 @@ If no version property is present Spring Data falls back to inspection of the id
 
 |Implementing `Persistable`
 |If an entity implements `Persistable`, Spring Data delegates the new detection to the `isNew(…)` method of the entity.
-See the link:{spring-data-commons-javadoc-base}/index.html?org/springframework/data/domain/Persistable.html[Javadoc] for details.
+See the {spring-data-commons-javadoc-base}/org/springframework/data/domain/Persistable.html[Javadoc] for details.
 
 _Note: Properties of `Persistable` will get detected and persisted if you use `AccessType.PROPERTY`.
 To avoid that, use `@Transient`._

src/main/antora/modules/ROOT/pages/object-mapping.adoc

@@ -336,7 +336,7 @@ data class Person(var id: String, val name: String = "unknown")
 Every time the `name` parameter is either not part of the result or its value is `null`, then the `name` defaults to `unknown`.
 
 NOTE: Delegated properties are not supported with Spring Data. The mapping metadata filters delegated properties for Kotlin Data classes.
-In all other cases you can exclude synthetic fields for delegated properties by annotating the property with `@delegate:org.springframework.data.annotation.Transient`.
+In all other cases you can exclude synthetic fields for delegated properties by annotating the property with {spring-data-commons-javadoc-base}/org/springframework/data/annotation/Transient.html[`@Transient`].
 
 [[property-population-of-kotlin-data-classes]]
 === Property population of Kotlin data classes