Update django.rst

fix documentation issue

docs/django.rst

@@ -19,7 +19,7 @@ Kaneda can be use with Django as a mechanism to reporting metrics and events.
 
 Alternatively you can set :code:`KANEDA_QUEUE` to specify a :ref:`queue <queues>` configuration to use Kaneda in :ref:`async mode <async>`::
 
-    KANEDA_BACKEND = 'kaneda.queues.CeleryQueue'
+    KANEDA_QUEUE = 'kaneda.queues.CeleryQueue'
     KANEDA_CELERY_BROKER = 'redis://localhost:6379/0'
 
 With this, you can use Kaneda in everyplace of your Django project::
@@ -199,4 +199,4 @@ KANEDA_LOGGER (=None)
   Name of a previously defined logger, to use in debug mode.
 
 KANEDA_LOGGER_FILENAME (=None)
-  Name of the file where logger will store the metrics, to use in debug mode.
+  Name of the file where logger will store the metrics, to use in debug mode.