Rename to hshassets in layout templates

hshassets/templates/hshassets/layout/hero.html

-{% extends "hshcdn/layout/base.html" %}
+{% extends "hshassets/layout/base.html" %}
 {% load staticfiles %}
 
 {% block body %}
@@ -9,7 +9,7 @@
                     <nav class="nav">
                         <div class="nav-left">
                             <a class="nav-item is-brand" href="/">
-                                <span class="icon"><img src="{% static 'hshcdn/img/hsh_brand/logo/service/32x64.png' %}" alt="" /></span>
+                                <span class="icon"><img src="{% static 'hshassets/img/hsh_brand/logo/service/32x64.png' %}" alt="" /></span>
                                 Hochschule Hannover
                             </a>
                         </div>

hshassets/templates/hshassets/layout/hero_nav.html

-{% extends "hshcdn/layout/hero.html" %}
+{% extends "hshassets/layout/hero.html" %}
 
 {% block hero-foot %}
     <div class="container">