Use .3 for baseline (#566)

Author: jglick

pom.xml

@@ -70,7 +70,7 @@
     <gitHubRepo>jenkinsci/${project.artifactId}-plugin</gitHubRepo>
     <!-- https://www.jenkins.io/doc/developer/plugin-development/choosing-jenkins-baseline/ -->
     <jenkins.baseline>2.504</jenkins.baseline>
-    <jenkins.version>${jenkins.baseline}.1</jenkins.version>
+    <jenkins.version>${jenkins.baseline}.3</jenkins.version>
 
     <hpi.compatibleSinceVersion>2.0.0</hpi.compatibleSinceVersion>
     <no-test-jar>false</no-test-jar>