chore: changelog for 5.0.0

Author: afranken

CHANGELOG.md

@@ -166,14 +166,16 @@ Version 5.x is JDK17 LTS bytecode compatible, with Docker and JUnit / direct Jav
   * Move all controller-related code from "com.adobe.testing.s3mock" to "com.adobe.testing.s3mock.controller" package.
   * Remove Apache libraries like "commons-compress", "commons-codec" or "commons-lang3" from dependencies. Kotlin and Java standard library provide similar functionality.
 * Version updates (deliverable dependencies)
-  * Bump Spring Boot version to 4.0.0
+  * Bump Spring Boot version to 4.0.1
   * Bump Spring Framework version to 7.0.1
-  * Bump java version from 17 to 25
-    * Compile with Java 25, target Java 17
+  * Bump Java version partially from 17 to 25
+    * Compile with Java 25, target Java 17. [This follows Spring guidance](https://spring.io/blog/2025/11/13/spring-framework-7-0-general-availability)
     * Docker container runs Java 25
   * Bump TestContainers to 2.0.2
+  * Bump kotlin.version from 2.2.21 to 2.3.0
+    * Compile with Kotlin 2.3, target Kotlin 2.2. [This follows Spring guidance](https://spring.io/blog/2025/12/18/next-level-kotlin-support-in-spring-boot-4#kotlin-2-baseline)
 * Version updates (build dependencies)
-  * Bump Maven to 4.0.0
+  * Bump Maven to 4.0.0-rc5 (TODO: update to 4.0.0)
   * Bump org.apache.maven.plugins:maven-release-plugin from 3.3.0 to 3.3.1
   * Bump com.puppycrawl.tools:checkstyle from 12.2.0 to 12.3.0
   * Bump actions/upload-artifact from 5.0.0 to 6.0.0