Bump org.jenkins-ci.plugins:plugin (#521)

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
...

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

@@ -5,7 +5,7 @@
   <parent>
     <groupId>org.jenkins-ci.plugins</groupId>
     <artifactId>plugin</artifactId>
-    <version>5.2099.v68c2f5e27299</version>
+    <version>6.2108.v08c2b_01b_cf4d</version>
     <relativePath/>
   </parent>