Bump org.jenkins-ci.plugins:plugin from 4.88 to 5.9 (#121)

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

pom.xml

@@ -3,7 +3,7 @@
   <parent>
     <groupId>org.jenkins-ci.plugins</groupId>
     <artifactId>plugin</artifactId>
-    <version>4.88</version>
+    <version>5.9</version>
     <relativePath />
   </parent>
 
@@ -29,7 +29,9 @@
     <checkstyle.skip>true</checkstyle.skip>
     <spotbugs.skip>true</spotbugs.skip>
     <maven.javadoc.skip>true</maven.javadoc.skip>
-    <jenkins.version>2.361.4</jenkins.version>
+    <!-- https://www.jenkins.io/doc/developer/plugin-development/choosing-jenkins-baseline/ -->
+    <jenkins.baseline>2.479</jenkins.baseline>
+    <jenkins.version>${jenkins.baseline}.3</jenkins.version>
     <gitHubRepo>jenkinsci/${project.artifactId}-plugin</gitHubRepo>
   </properties>