Update convert.py (#6)

- Update convert.py (a7222ae4346614a4b7ae2b5122e9e7d632970689)


Co-authored-by: Rodri <bullerwins@users.noreply.huggingface.co>

convert.py

@@ -28,7 +28,7 @@ Sample usage:
 
 ```
 python src/transformers/models/mixtral/convert_mixtral_weights_to_hf.py \
-    --input_dir /path/to/downloaded/mixtral/weights --model_size 7B --output_dir /output/path
+    --input-dir /path/to/downloaded/mixtral/weights --model-size 7B --output-dir /output/path
 ```
 
 Thereafter, models can be loaded via: