Update footer. I no longer use Gitlab.

_layouts/default.html

@@ -20,6 +20,6 @@
         <div id="content">
 {{ content }}
         </div>
-        <footer>Made with <a href="https://jekyllrb.com/">Jekyll</a>, hosted on <a href="https://git.kunsmann.eu/franzi.business/website/">Gitlab</a></footer>
+        <footer>Made with <a href="https://jekyllrb.com/">Jekyll</a>, hosted on <a href="https://git.kunsmann.eu/franzi.business/website/">Gitea</a></footer>
   </body>
 </html>