feat(error): make text area narrower for better legibility

Author: machikoyasuda

benefits/templates/error.html

@@ -15,7 +15,7 @@ <h1 class="h2 text-center">
     </h1>
 
     <div class="row justify-content-center">
-      <div class="col-lg-8 pt-4">
+      <div class="col-lg-6 pt-4">
         {% block paragraphs %}
         {% endblock paragraphs %}
       </div>