Bump org.jenkins-ci.main:jenkins-test-harness

Bumps [org.jenkins-ci.main:jenkins-test-harness](https://github.com/jenkinsci/jenkins-test-harness) from 2105.v5a_7b_f123294f to 2112.ve584e0edc63b_.
- [Release notes](https://github.com/jenkinsci/jenkins-test-harness/releases)
- [Changelog](https://github.com/jenkinsci/jenkins-test-harness/blob/master/docs/CHANGELOG-OLD.md)
- [Commits](https://github.com/jenkinsci/jenkins-test-harness/commits)

---
updated-dependencies:
- dependency-name: org.jenkins-ci.main:jenkins-test-harness
  dependency-type: direct:development
...

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

test/pom.xml

@@ -121,7 +121,7 @@ THE SOFTWARE.
     <dependency>
       <groupId>${project.groupId}</groupId>
       <artifactId>jenkins-test-harness</artifactId>
-      <version>2105.v5a_7b_f123294f</version>
+      <version>2112.ve584e0edc63b_</version>
       <scope>test</scope>
       <exclusions>
         <exclusion>