chore: add new line EOF

Signed-off-by: Michal Fiedorowicz <mfiedorowicz@netboxlabs.com>

Author: mfiedorowicz

tests/test_client.py

@@ -1144,4 +1144,4 @@ def test_certificate_loading_efficiency(tmp_path):
         mock_auth_instance.authenticate.assert_called_once()
 
         # Verify _load_certs was NOT called again (certificates reused)
-        mock_load_certs.assert_not_called()
+        mock_load_certs.assert_not_called()