Replace invalid reference to FeedContent.html with Content.html

Posts.html refers attempts to include FeedContent.html, however that file doesn't exist. This commit changes it to include Content.html instead.

Author: chmosquera

_layouts/Post.html

@@ -84,7 +84,7 @@
                 <div class="column is-6-widescreen  is-8-desktop is-8-tablet is-12-mobile">
                             <h5 class="meta-title"><a href="/">← Home</a></h5>
                             <div class="jumbo">{{page.title}}</div>
-                            {%- include FeedContent.html -%}
+                            {%- include Content.html -%}
                             {%- include Feed.html -%}
                 </div>
                     {%- endif -%}
@@ -180,4 +180,4 @@ <h1>{{page.title}}</h1>
     {%- include Footer.html -%}             
 </main>
 </body>
-</html>
+</html>