Test with Java 25 (#520)

* Bump io.jenkins.tools.incrementals:git-changelist-maven-extension

Bumps [io.jenkins.tools.incrementals:git-changelist-maven-extension](https://github.com/jenkinsci/incrementals-tools) from 1.10 to 1.13.
- [Release notes](https://github.com/jenkinsci/incrementals-tools/releases)
- [Commits](jenkinsci/incrementals-tools@parent-1.10...parent-1.13)

---
updated-dependencies:
- dependency-name: io.jenkins.tools.incrementals:git-changelist-maven-extension
  dependency-version: '1.13'
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

* Bump io.jenkins.tools.bom:bom-2.492.x

Bumps [io.jenkins.tools.bom:bom-2.492.x](https://github.com/jenkinsci/bom) from 5054.v620b_5d2b_d5e6 to 5473.vb_9533d9e5d88.
- [Release notes](https://github.com/jenkinsci/bom/releases)
- [Commits](https://github.com/jenkinsci/bom/commits)

---
updated-dependencies:
- dependency-name: io.jenkins.tools.bom:bom-2.492.x
  dependency-version: 5473.vb_9533d9e5d88
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

* Bump org.jenkins-ci.plugins:plugin from 5.18 to 5.28

Bumps [org.jenkins-ci.plugins:plugin](https://github.com/jenkinsci/plugin-pom) from 5.18 to 5.28.
- [Release notes](https://github.com/jenkinsci/plugin-pom/releases)
- [Changelog](https://github.com/jenkinsci/plugin-pom/blob/master/CHANGELOG.md)
- [Commits](jenkinsci/plugin-pom@plugin-5.18...plugin-5.28)

---
updated-dependencies:
- dependency-name: org.jenkins-ci.plugins:plugin
  dependency-version: '5.28'
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

* Test with Java 25 and Java 21

Java 25 released September 16, 2025.  The Jenkins project wants to support
Java 25 soon.  Compile and test on ci.jenkins.io with Java 25 and Java 21.

Intentionally continues to generate Java 17 byte code as configured by
the plugin parent pom.

Does not compile or test with Java 17 on ci.jenkins.io any longer
because we have found no issues in the past that were specific to the
Java 17 compiler.  The plan is to drop support for Java 17 in the not
too distant future so that the Jenkins project is only supporting two
major Java versions at a time, Java 21 and Java 25.

Simplifies the configuration block of the Jenkinsfile so that it more
closely resembles the Jenkins plugin archetype.

Requires pull requests:

* #514
* #510
* #506

Testing done:

* Confirmed that automated tests pass with Java 25

---------

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: MarkEWaite

.mvn/extensions.xml

@@ -2,6 +2,6 @@
   <extension>
     <groupId>io.jenkins.tools.incrementals</groupId>
     <artifactId>git-changelist-maven-extension</artifactId>
-    <version>1.10</version>
+    <version>1.13</version>
   </extension>
 </extensions>

Jenkinsfile

@@ -1,8 +1,7 @@
 #!groovy
 
 def configurations = [
-    [ platform: "linux", jdk: "17", jenkins: null ],
-    [ platform: "windows", jdk: "17", jenkins: null ],
-    [ platform: "linux", jdk: "21", jenkins: null ],
+    [ platform: "linux", jdk: 25 ],
+    [ platform: "windows", jdk: 21 ],
 ]
 buildPlugin(useContainerAgent: true, configurations: configurations)

pom.xml

@@ -4,7 +4,7 @@
   <parent>
     <groupId>org.jenkins-ci.plugins</groupId>
     <artifactId>plugin</artifactId>
-    <version>5.18</version>
+    <version>5.28</version>
     <relativePath />
   </parent>
   <groupId>io.jenkins.plugins</groupId>