Fix typo crashing the bug (wrong tag definition)

Author: Marc Garcia

_layouts/post.html

@@ -28,7 +28,7 @@ <h2>{{ page.title }}</h2>
                                 <p>{{ sponsor.content }}</p>
                             </div>
 
-                            {if project.name %}
+                            {% if project.name %}
                                 {% if project.logo %}
                                     <img class="post__project-logo" src="{{ site.baseurl }}/{{ project.logo }}">
                                 {% endif %}