Need to update requirements.txt

[sahilqure]

The requreiments.txt should be updated with flash-attn and workable torch which works well with all the LLMs and VLMs.
Check llama-factory for that. Its very painful to track versions of different models

[Jintao-Huang]

https://swift.readthedocs.io/zh-cn/latest/Instruction/%E6%94%AF%E6%8C%81%E7%9A%84%E6%A8%A1%E5%9E%8B%E5%92%8C%E6%95%B0%E6%8D%AE%E9%9B%86.html