feat(linked data): improve itemtype for project showcase + pub. stream

Close #819

layouts/partials/project_li_showcase.html

@@ -19,7 +19,7 @@
 {{ $js_tag_classes := delimit (apply (apply $item.Params.tags "replace" "." " " "-") "printf" "js-id-%s" ".") " " }}
 
 <div class="col-lg-12 project-item isotope-item {{ $js_tag_classes | safeHTMLAttr }}" itemscope itemtype="http://schema.org/CreativeWork">
-  <div class="row align-items-center" itemscope itemtype="http://schema.org/Event">
+  <div class="row align-items-center">
     <div class="col-12 col-md-6">
       <h3 class="article-title mb-0 mt-0" itemprop="name">
         {{- if $do_link}}<a href="{{ $link }}" {{ $target | safeHTMLAttr }} itemprop="url">{{end -}}

layouts/partials/publication_li_stream.html

@@ -1,4 +1,4 @@
-<div class="media stream-item" itemscope itemtype="http://schema.org/Event">
+<div class="media stream-item" itemscope itemtype="http://schema.org/ScholarlyArticle">
   <div class="media-body">
 
     <h3 class="article-title mb-0 mt-0" itemprop="name">