footer: do not use list for non-list column

This isn't a list, so let's not use a list for it. It's just two
independent items, and it makes the hard-coded padding a bit less
awkward by turning them into paragraphs.

layouts/partials/footer.html

@@ -30,12 +30,10 @@
       </div>
 
       <div class="col">
-        <ul class="list-unstyled">
-          <li class="text-muted pb-2">Hosted by <a class="text-muted" href="https://www.freedesktop.org/">Freedesktop.org</a></li>
-          {{ if .Page.Path }}
-          <li><a class="text-muted" href="{{ .Site.Params.GitLabURL }}/-/blob/main/content/{{ .Page.Path }}">Edit this page</a></li>
-          {{ end }}
-        </ul>
+        <p class="text-muted">Hosted by <a class="text-muted" href="https://www.freedesktop.org/">Freedesktop.org</a></p>
+        {{ if .Page.Path }}
+        <p><a class="text-muted" href="{{ .Site.Params.GitLabURL }}/-/blob/main/content/{{ .Page.Path }}">Edit this page</a></p>
+        {{ end }}
       </div>
 
     </div>