Bump plugin from 4.27 to 4.28

Bumps [plugin](https://github.com/jenkinsci/plugin-pom) from 4.27 to 4.28.
- [Release notes](https://github.com/jenkinsci/plugin-pom/releases)
- [Changelog](https://github.com/jenkinsci/plugin-pom/blob/master/CHANGELOG.md)
- [Commits](jenkinsci/plugin-pom@plugin-4.27...plugin-4.28)

---
updated-dependencies:
- dependency-name: org.jenkins-ci.plugins:plugin
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

pom.xml

@@ -5,7 +5,7 @@
   <parent>
     <groupId>org.jenkins-ci.plugins</groupId>
     <artifactId>plugin</artifactId>
-    <version>4.27</version>
+    <version>4.28</version>
     <relativePath />
   </parent>
   <groupId>org.jenkins-ci.plugins.aws-java-sdk</groupId>