Fixed #11056 -- Corrected reference to File class in storage docs. Th…

…anks to wam for the report.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@10970 bcc190cf-cafb-0310-a4f2-bffc1f526a37

docs/ref/files/storage.txt

@@ -43,8 +43,8 @@ modify the filename as necessary to get a unique name. The actual name of the
 stored file will be returned.
 
 The ``content`` argument must be an instance of
-:class:`django.db.files.File` or of a subclass of
-:class:`~django.db.files.File`.
+:class:`django.core.files.File` or of a subclass of
+:class:`~django.core.files.File`.
 
 ``Storage.delete(name)``
 ~~~~~~~~~~~~~~~~~~~~~~~~