fix minor issue in e2b (#436)

src/smolagents/e2b_executor.py

@@ -137,7 +137,7 @@ locals().update({key: value for key, value in pickle_dict.items()})
                         if getattr(result, attribute_name) is not None:
                             image_output = getattr(result, attribute_name)
                             decoded_bytes = base64.b64decode(image_output.encode("utf-8"))
-                            return Image.open(BytesIO(decoded_bytes)), execution_logs
+                            return Image.open(BytesIO(decoded_bytes)), execution_logs, self.final_answer
                     for attribute_name in [
                         "chart",
                         "data",