layouts/partials/footer.html: Add .Site.baseURL around copyright holder.
Please note, that I failed to test this locally. Due to https://gitlab.das-netzwerkteam.de/nwt/nwt-homepage/-/issues/3
Please note, that I failed to test this locally. Due to https://gitlab.das-netzwerkteam.de/nwt/nwt-homepage/-/issues/3