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

Beta Give feedback

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

Suggested Labels

Maintainers using the release drafter integration have found the maintenance and dependencies labels useful for categorizing these changes.

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

[slide]

I generally don't merge things that are not signed. Can you sign the commit(s) and push/

[sghill]

Thanks @slide! I added a signature and pushed.