Updated Jenkinsfile for ci.jenkins.io

[AniketNS]

Testing done

### 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
- [ ] Please describe what you did
- [ ] Link to relevant issues in GitHub or Jira
- [ ] Link to relevant pull requests, esp. upstream and downstream changes
- [ ] Ensure you have provided tests - that demonstrates feature works or fixes the issue

[kinow]

Thanks for the PR. I will hold merging it just until the build is fixed. It doesn't seem to be caused by this PR, but by something in the code or dependencies, I think, so it should be fixed in another PR and then I'll rebase this one. Thanks!