Fix authors list

layouts/partials/publications/hero-single.html

 {{- partial "header/hero.html"
       (dict
         "title" .Title
-        "subtitle" .Params.authors
+        "subtitle" .Params.authors_list
         "context" .
       ) -}}

layouts/partials/publications/publication.html

@@ -2,7 +2,7 @@
   {{ $title := .Title }}
   <a href="{{ .Permalink }}" title="{{ safeHTML (i18n "commons.more_aria" (dict "Title" $title)) }}">{{ partial "PrepareHTML" $title }}</a>
   <p class="publication-meta">
-    {{ .Date.Format "2006" -}}{{- if .Params.authors -}},{{- end }} {{ .Params.authors }}
+    {{ .Date.Format "2006" -}}{{- if .Params.authors_list -}},{{- end }} {{ .Params.authors_list }}
   </p>
   <p class="publication-ref">
     {{ partial "PrepareHTML" .Params.ref }}