Fixes #938: Provider view yields an error if one or more circuits is …

…assigned to a tenant

netbox/templates/circuits/provider.html

@@ -152,7 +152,7 @@ <h1>{{ provider }}</h1>
                         </td>
                         <td>
                             {% if c.tenant %}
-                                <a href="{% url 'tenants:tenant' slug=c.tenant.slug %}">{{ c.tenant }}</a>
+                                <a href="{% url 'tenancy:tenant' slug=c.tenant.slug %}">{{ c.tenant }}</a>
                             {% else %}
                                 <span class="text-muted">&mdash;</span>
                             {% endif %}