Fix author links in the proposals lists (#1997)

Links were broken since the upgrade of the hugo version.

Signed-off-by: Kévin Commaille <zecakeh@tedomum.fr>

changelogs/internal/newsfragments/1997.clarification

@@ -0,0 +1 @@
+Fix relative URLs when serving the specification with a custom `baseURL`.

layouts/shortcodes/proposal-tables.html

@@ -68,8 +68,8 @@
       <td>{{ .title }}</td>
       <td>{{ .created_at }}</td>
       <td>{{ .updated_at }}</td>
-      <td>{{ with $docs_links }}{{ $docs_links }}{{ end }}</td>
-      <td>{{ $authors }}</td>
+      <td>{{ with $docs_links }}{{ $docs_links | safeHTML }}{{ end }}</td>
+      <td>{{ $authors | safeHTML }}</td>
       <td>{{ with .shepherd }}<a href="https://github.com/{{ . }}">@{{ . }}</a>{{ end }}</td>
   </tr>
         {{ end }}