Cache the primary nav per site

opentech/public/home/templates/home/home_page.html

@@ -26,7 +26,7 @@
             </div>
 
             <section class="header__menus header__menus--desktop">
-                {% cache 3600 navigation__primary %}
+                {% cache 3600 navigation__primary request.site %}
                     {% primarynav %}
                 {% endcache %}
 
@@ -50,7 +50,7 @@
                         </button>
                     </div>
                 </div>
-                {% cache 3600 navigation__primary %}
+                {% cache 3600 navigation__primary request.site %}
                     {% primarynav %}
                 {% endcache %}
             </section>

opentech/templates/base.html

@@ -92,7 +92,7 @@
                     </div>
 
                     <section class="header__menus header__menus--desktop">
-                        {% cache 3600 navigation__primary %}
+                        {% cache 3600 navigation__primary request.site %}
                             {% primarynav %}
                         {% endcache %}
 
@@ -116,7 +116,7 @@
                                 </button>
                             </div>
                         </div>
-                        {% cache 3600 navigation__primary %}
+                        {% cache 3600 navigation__primary request.site %}
                             {% primarynav %}
                         {% endcache %}
                     </section>