fix(layout): sidebar should appear on the side of newsletter posts

not the bottom

Author: justinmk

_layouts/newsletter.html

@@ -5,7 +5,7 @@
 {% include nav.html active='News' %}
 
 <section class="front-section">
-  <div class="container newsletter">
+  <div class="newsletter container golden-grid">
     <div class="col-wide">
       <h1>{{ page.title }}</h1>