This PR improves the model card by adding the `library_name: transformers` tag to the metadata. This is based on evidence from `config.json` and `tokenizer_config.json` which show `LlamaForCausalLM` and `LlamaTokenizer`, confirming compatibility with the Hugging Face Transformers library. Adding this tag will enable the automated "how to use" widget on the model page, providing users with a convenient code snippet to interact with the model.
