fix: ruff format

Author: apkostka

backend/tests/test_chat.py

@@ -33,8 +33,10 @@ def mock_vertexai_generative_model(mocker):
 def chat_manager(mocker, mock_vertexai, mock_vertexai_generative_model):
     # Mock Google service account credentials
     mock_credentials = mocker.Mock()
-    mocker.patch("tenantfirstaid.chat.service_account.Credentials.from_service_account_file", 
-                 return_value=mock_credentials)
+    mocker.patch(
+        "tenantfirstaid.chat.service_account.Credentials.from_service_account_file",
+        return_value=mock_credentials,
+    )
     return ChatManager()