Update README.md

Fix model name and path

README.md

@@ -27,10 +27,10 @@ git clone https://github.com/ml-explore/mlx-examples.git
 
 # Download model
 export HF_HUB_ENABLE_HF_TRANSFER=1
-huggingface-cli download --local-dir Llama-2-7b-chat-mlx mlx-llama/Llama-2-7b-chat-mlx
+huggingface-cli download --local-dir Llama-2-7b-chat-mlx/ mlx-community/Llama-2-7b-chat-4-bit
 
 # Run example
-python mlx-examples/llama/llama.py --prompt "My name is " Llama-2-7b-chat-mlx/ Llama-2-7b-chat-mlx/tokenizer.model
+python mlx-examples/llms/llama/llama.py --prompt "My name is " --model-path Llama-2-7b-chat-mlx/
 ```
 
 Please, refer to the [original model card](https://huggingface.co/meta-llama/Llama-2-7b-chat) for details on Llama 2.