Modernize to Jenkins 2.375.4

[sghill-rewrite]

Hi!

This PR aims to modernize tooling and move this plugin to the recommended Jenkins baseline version.

Testing done

Ran mvn clean verify.

### Submitter checklist
- [x] Make sure you are opening from a **topic/feature/bugfix branch** (right side) and not your main branch!
- [x] Ensure that the pull request title represents the desired changelog entry
- [x] Please describe what you did
- [x] Link to relevant issues in GitHub or Jira
- [x] Link to relevant pull requests, esp. upstream and downstream changes
- [x] Ensure you have provided tests - that demonstrates feature works or fixes the issue

Use this link to re-run the recipe: https://app.moderne.io/recipes/org.openrewrite.jenkins.ModernizePlugin