Fix logical error for DynDNS

Short description of changes

There was an error on the Unregistered servers page. Dynamic DNS gives you a Domain, not an IP address.

Context: Fixes an issue? Related issues / Status of this Pull Request

Ready for review What is missing until this pull request can be merged?

Merge of weblate PR

Does this need translation? YES

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