the link to remove a server was using the wrong url.

[VikinoCavalier]

the link to remove a server was using the wrong url.

Testing done

manual testing

### 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

Originally posted by @mawinter69 in jenkinsci/gerrit-trigger-plugin#508