Standardize RAG model card (#40222)
* Standardize RAG model card
Update rag.md to follow the new Hugging Face model card template:
- Added friendly overview in plain language
- Added pipeline and AutoModel usage examples
- Included quantization example with BitsAndBytesConfig
- Added notes and resources sections
- Removed abstract and FlashAttention badge
* Standardize RAG model card
Update rag.md to follow the new Hugging Face model card template:
- Added friendly overview in plain language
- Added AutoModel usage example
- Included quantization example with BitsAndBytesConfig
