Use jenkins.baseline to reduce bom update mistakes (#269)

Author: strangelookingnerd

pom.xml

@@ -16,8 +16,10 @@
         <revision>6.10.0</revision>
         <changelist>999999-SNAPSHOT</changelist>
         <gitHubRepo>jenkinsci/${project.artifactId}-plugin</gitHubRepo>
-        <jenkins.version>2.401.3</jenkins.version>
-        <bom>2.401.x</bom>
+        <!-- https://www.jenkins.io/doc/developer/plugin-development/choosing-jenkins-baseline/ -->
+        <jenkins.baseline>2.401</jenkins.baseline>
+        <jenkins.version>${jenkins.baseline}.3</jenkins.version>
+        <bom>${jenkins.baseline}.x</bom>
         <bom.version>2745.vc7b_fe4c876fa_</bom.version>
         <hpi.compatibleSinceVersion>6.8.1</hpi.compatibleSinceVersion>
     </properties>