fix(requirements.txt): accelerate version mismatch

[tpoisonooo]

typo, hf 代码报错。

│ /root/miniconda3/envs/torch2/lib/python3.10/site-packages/transformers/trainer.py:2794 in        │
│ save_model                                                                                       │
│                                                                                                  │
│   2791 │   │   elif self.is_deepspeed_enabled:                                                   │
│   2792 │   │   │   # this takes care of everything as long as we aren't under zero3              │
│   2793 │   │   │   if version.parse(accelerate_version) <= version.parse("0.20.3"):              │
│ ❱ 2794 │   │   │   │   raise ValueError("Install Accelerate from main branch")                   │
│   2795 │   │   │   try: