[Documentation] Possible mistake in model_doc LLaMA
### System Info

Maybe a small mistake in the documentation. Here: https://github.com/huggingface/transformers/blob/ef42c2c487260c2a0111fa9d17f2507d84ddedea/docs/source/en/model_doc/llama.mdx?plain=1#L17

The title "LLaMA: Open and Efficient Foundation Language Models" is repeated. Does it mean [this arxiv link](https://arxiv.org/pdf/2302.13971.pdf)?

### Who can help?

_No response_

### Information

- [ ] The official example scripts
- [ ] My own modified scripts

### Tasks

- [ ] An officially supported task in the `examples` folder (such as GLUE/SQuAD, ...)
- [ ] My own task or dataset (give details below)

### Reproduction

Steps to reproduce:

1. Open docs https://huggingface.co/docs/transformers/main/en/model_doc/llama#overview
2. See the first line

### Expected behavior

It should be a link to https://arxiv.org/pdf/2302.13971.pdf
@habaneraa You're right! This seems to be a mistake in the docs. I will open a PR to fix this.