Update openai_utils.py

Author: hemanth-asirvatham

src/gabriel/utils/openai_utils.py

@@ -1781,7 +1781,7 @@ async def get_response(
     elif background_mode is not None:
         effective_background = bool(background_mode)
     else:
-        effective_background = timeout is None
+        effective_background = False
     background_argument: Optional[bool] = None
     if explicit_background is not None:
         background_argument = bool(explicit_background)