Upgrade Jenkins core to 2.440 and follow pom archetype for bom

Author: jonesbusy

pom.xml

@@ -29,7 +29,8 @@
     <revision>2.9.0</revision>
     <changelist>999999-SNAPSHOT</changelist>
     <!-- https://www.jenkins.io/doc/developer/plugin-development/choosing-jenkins-baseline/ -->
-    <jenkins.version>2.426.3</jenkins.version>
+    <jenkins.baseline>2.440</jenkins.baseline>
+    <jenkins.version>${jenkins.baseline}.3</jenkins.version>
     <gitHubRepo>jenkinsci/${project.artifactId}-plugin</gitHubRepo>
     <spotless.check.skip>false</spotless.check.skip>
     <json-smart.version>2.5.1</json-smart.version>
@@ -39,7 +40,7 @@
     <dependencies>
       <dependency>
         <groupId>io.jenkins.tools.bom</groupId>
-        <artifactId>bom-2.426.x</artifactId>
+        <artifactId>bom-${jenkins.baseline}.x</artifactId>
         <version>3023.v02a_987a_b_3ff9</version>
         <type>pom</type>
         <scope>import</scope>