Fixed download URL in setup.py.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@17534 bcc190cf-cafb-0310-a4f2-bffc1f526a37

setup.py

@@ -75,7 +75,7 @@ setup(
     author = 'Django Software Foundation',
     author_email = 'foundation@djangoproject.com',
     description = 'A high-level Python Web framework that encourages rapid development and clean, pragmatic design.',
-    download_url = 'https://www.djangoproject.com/m/releases/1.4/Django-1.4-b1.tar.gz',
+    download_url = 'https://www.djangoproject.com/m/releases/1.4/Django-1.4b1.tar.gz',
     packages = packages,
     cmdclass = cmdclasses,
     data_files = data_files,