Bump org.jenkins-ci.plugins:plugin (#456)

Bumps [org.jenkins-ci.plugins:plugin](https://github.com/jenkinsci/plugin-pom) from 5.2099.v68c2f5e27299 to 6.2108.v08c2b_01b_cf4d.
- [Release notes](https://github.com/jenkinsci/plugin-pom/releases)
- [Changelog](https://github.com/jenkinsci/plugin-pom/blob/master/CHANGELOG.md)
- [Commits](https://github.com/jenkinsci/plugin-pom/commits)

---
updated-dependencies:
- dependency-name: org.jenkins-ci.plugins:plugin
  dependency-version: 6.2108.v08c2b_01b_cf4d
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

pom.xml

@@ -28,7 +28,7 @@
     <parent>
       <groupId>org.jenkins-ci.plugins</groupId>
       <artifactId>plugin</artifactId>
-      <version>5.2099.v68c2f5e27299</version>
+      <version>6.2108.v08c2b_01b_cf4d</version>
       <relativePath />
     </parent>
     <groupId>org.jenkins-ci.plugins.workflow</groupId>