Add missing comma

Author: lovelydinosaur

rest_framework/templates/rest_framework/base.html

@@ -263,7 +263,7 @@ <h1>{{ name }}</h1>
     {% block script %}
       <script>
         window.drf = {
-          csrfHeaderName: "{{ csrf_header_name|default:'X-CSRFToken' }}"
+          csrfHeaderName: "{{ csrf_header_name|default:'X-CSRFToken' }}",
           csrfCookieName: "{{ csrf_cookie_name|default:'csrftoken' }}"
         };
       </script>