README: add explicit Credits (Mistral upstream + MLX community source)

README.md

@@ -41,4 +41,7 @@ print(generate(model, tokenizer, "Hello!", max_tokens=64))
 
 ## License
 - Apache-2.0 (see `LICENSE.txt`).
-- Credit: MLX base from `mlx-community/Voxtral-Mini-3B-2507-bf16`; upstream model [`mistralai/Voxtral-Mini-3B-2507`](https://huggingface.co/mistralai/Voxtral-Mini-3B-2507).
+
+## Credits
+- Upstream model: [`mistralai/Voxtral-Mini-3B-2507`](https://huggingface.co/mistralai/Voxtral-Mini-3B-2507)
+- MLX bf16 base used for quantization: [`mlx-community/Voxtral-Mini-3B-2507-bf16`](https://huggingface.co/mlx-community/Voxtral-Mini-3B-2507-bf16)