test: Update a test to the new return code.

When including `JwtAuthentication`, the auth_header becomes `JWT
realm="api"`. Without it, it is `None`. This changes the behavior of the
code in DRF and returns a slightly different auth response.

Relevant Code: https://github.com/encode/django-rest-framework/blob/56946fac8f29aa44ce84391f138d63c4c8a2a285/rest_framework/views.py#L456C3-L456C3

openedx/core/djangoapps/embargo/tests/test_views.py

@@ -148,7 +148,7 @@ def mock_country(reader, country):
     def test_course_access_endpoint_with_logged_out_user(self):
         self.client.logout()
         response = self.client.get(self.url, data=self.request_data)
-        assert response.status_code == 403
+        assert response.status_code == 401
 
     def test_course_access_endpoint_with_non_staff_user(self):
         user = UserFactory(is_staff=False)