Modernize to Jenkins 2.440.3

[sghill-rewrite]

Hi!

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

If there are additional requirements for accepting PRs - such as additional lag time before adopting a baseline - feel free to reply in the comments.

Testing done

Ran mvn clean verify.

Submitter checklist

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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

Refs: sghill-rewrite/campaigns#4

Use this link to re-run the recipe: https://app.moderne.io/recipes/org.openrewrite.jenkins.ModernizePlugin?organizationId=MGEyZWY1M2UtOTE4Mi00NmZlLThlNjAtMjczMjUzOTcxZThk

Closes #59
Closes #68