fix doc

Author: rebel-jinhwan

docs/guides/datasets.md

@@ -131,7 +131,7 @@ GuideLLM supports various file formats for datasets, including text, CSV, JSON,
   {"prompt": "Hello, how are you?", "output_tokens_count": 5, "additional_column": "foo", "additional_column2": "bar"}
   {"prompt": "What is your name?", "output_tokens_count": 3, "additional_column": "baz", "additional_column2": "qux"}
   ```
-- **Multi-turn messages (`.jsonl`, `.json`, `.csv`, etc.)**: When the dataset has a column named `messages` whose value is a list of objects with `role` and `content` (OpenAI-style chat message format), GuideLLM uses that column as the full conversation for each request instead of building a single-turn message from `prefix_column` and `text_column`. Each row represents one request; the column value is the complete message list (e.g. `system`, `user`, `assistant`, `user`). You can combine this with other columns such as `output_tokens_count` (or map a custom name via `--data-column-mapper`). Content may be a string or a list of content parts (e.g. `[{"type": "text", "text": "..."}]`).
+- **Multi-turn messages (`.jsonl`)**: When the dataset has a column named `messages` whose value is a list of objects with `role` and `content` (OpenAI-style chat message format), GuideLLM uses that column as the full conversation for each request instead of building a single-turn message from `prefix_column` and `text_column`. Each row represents one request; the column value is the complete message list (e.g. `system`, `user`, `assistant`, `user`). You can combine this with other columns such as `output_tokens_count` (or map a custom name via `--data-column-mapper`). Content may be a string or a list of content parts (e.g. `[{"type": "text", "text": "..."}]`).
   ```json
   {"messages": [{"role": "system", "content": "You are a helpful assistant."}, {"role": "user", "content": "What is AI?"}, {"role": "assistant", "content": "AI is..."}, {"role": "user", "content": "Give an example."}], "output_tokens_count": 256}
   {"messages": [{"role": "user", "content": "Hello."}], "output_tokens_count": 128}