Update Running-a-Server.md broken links

[henkdegroot]

Short description of changes

Fix broken links

Context: Fixes an issue? Related issues

No issue created. Discovered the issue while verifying translation and links.

Status of this Pull Request

Complete

What is missing until this pull request can be merged?

Most likely best to merge after the Weblate PR is merged.

Does this need translation?

Related translation po files may require updating as well.

Checklist

• [x] I've verified that this Pull Request follows the general code principles
• [x] I waited some time after this Pull Request was opened and all GitHub checks completed without errors.
• [x] I'm sure that this Pull Request goes to the correct branch

[jujudusud]

To be merged after Weblate PR.