Bump baseline to 2.528.x (#504)

Author: strangelookingnerd

Jenkinsfile

@@ -1,9 +1,11 @@
-// Builds the plugin using https://github.com/jenkins-infra/pipeline-library
+/*
+ See the documentation for more options:
+ https://github.com/jenkins-infra/pipeline-library/
+*/
 buildPlugin(
-  forkCount: '1C',
-  useContainerAgent: true,
+  forkCount: '1C', // Run parallel tests on ci.jenkins.io for lower costs, faster feedback
+  useContainerAgent: true, // Set to `false` if you need to use Docker for containerized tests
   configurations: [
-    // Test the minimum required Jenkins Version.
-    [ platform: 'linux', jdk: '17', jenkins: null ],
-    [ platform: 'windows', jdk: '21', jenkins: null ]
+    [platform: 'linux', jdk: 25],
+    [platform: 'windows', jdk: 21],
 ])

pom.xml

@@ -41,7 +41,7 @@
 
   <properties>
     <gitHubRepo>jenkinsci/custom-folder-icon-plugin</gitHubRepo>
-    <jenkins.baseline>2.504</jenkins.baseline>
+    <jenkins.baseline>2.528</jenkins.baseline>
     <jenkins.version>2.539</jenkins.version>
     <revision>2</revision>
     <changelist>999999-SNAPSHOT</changelist>
@@ -55,7 +55,7 @@
       <dependency>
         <groupId>io.jenkins.tools.bom</groupId>
         <artifactId>bom-${jenkins.baseline}.x</artifactId>
-        <version>5750.vec44cb_c78352</version>
+        <version>5759.va_1462c940572</version>
         <type>pom</type>
         <scope>import</scope>
       </dependency>