Merge pull request #133 from jenkinsci/dependabot/maven/org.jenkins-ci.plugins-plugin-5.2

Bump org.jenkins-ci.plugins:plugin from 5.6 to 5.9

Author: basil

pom.xml

@@ -5,7 +5,7 @@
   <parent>
     <groupId>org.jenkins-ci.plugins</groupId>
     <artifactId>plugin</artifactId>
-    <version>5.6</version>
+    <version>5.9</version>
     <relativePath />
   </parent>