Bugfix on post layout

Author: nycotin

_layouts/post.html

@@ -48,11 +48,11 @@ <h1>{{ page.title }}</h1>
                 </div>
               </header>
               <div class="article-header-img px-2">
-                {% if post.blurb_img %}
-                  <img src="{{post.blurb_img}}" alt="header image for {{post.title}}">
+                {% if page.blurb_img %}
+                  <img src="{{page.blurb_img}}" alt="header image for {{page.title}}">
                 {% else %}
                   <img src="/assets/images/blog/default.jpg"
-                      alt="header image for {{post.title}}">
+                      alt="header image for {{page.title}}">
                 {% endif %}
                 {% if page.blurb_img_source %}
                   <div class="img-source">{{page.blurb_img_source}}</div>