Use .3 for baseline (#635)

Author: jglick

pom.xml

@@ -17,7 +17,7 @@
     <changelist>999999-SNAPSHOT</changelist>
     <!-- https://www.jenkins.io/doc/developer/plugin-development/choosing-jenkins-baseline/ -->
     <jenkins.baseline>2.479</jenkins.baseline>
-    <jenkins.version>${jenkins.baseline}.1</jenkins.version>
+    <jenkins.version>${jenkins.baseline}.3</jenkins.version>
     <gitHubRepo>jenkinsci/${project.artifactId}-plugin</gitHubRepo>
     <hpi.strictBundledArtifacts>true</hpi.strictBundledArtifacts>
     <hpi.bundledArtifacts>groovy-sandbox</hpi.bundledArtifacts>