Correct filename

Should this be `urls.py`? I know it's referring to the schema view, but `urlpatterns` are generally in `urls.py`.

Author: williln

docs/index.md

@@ -33,7 +33,7 @@ the schemas section.
 
 #### Example
 
-**views.py**
+**urls.py**
 ```python
 from django.conf.urls import url
 from rest_framework_swagger.views import get_swagger_view