restore deleted ratelimit cmnt, re #10787

tests/search/search_export_tests.py

@@ -199,6 +199,7 @@ def test_login_via_basic_auth_rate_limited(self):
         request = RequestFactory().get(
             reverse("api_export_results"),
             HTTP_AUTHORIZATION=auth_string,
+            # In reality this would be added by django_ratelimit.
             QUERY_STRING="limited=True",
         )
         request.user = User.objects.get(username="anonymous")