update cms previews to new layouts. close #234

layouts/author/single.html

@@ -1,6 +1,6 @@
 {{ define "main" }}
 
-<section class="section bg-light">
+<section class="section">
   <div class="container">
 		<div class="text-center">
 		  {{ if .Params.image }}
@@ -19,7 +19,7 @@
   </div>
 </section>
 
-<section class="section pt-0 bg-light">
+<section class="section pt-0">
   <div class="container">
     <div class="title text-center">
 		  <h2 class="mb-4">Geschrieben von {{ .Title }}</h2>