Fix import, add pip install

README.md

@@ -13,11 +13,15 @@ It was proposed in [FAST: Efficient Action Tokenization for Vision-Language-Acti
 
 ## How to Get Started
 
+```bash
+pip install "lerobot[pi]@git+https://github.com/huggingface/lerobot.git"
+```
+
 ```python
 import torch
 from lerobot.policies.factory import make_pre_post_processors
 import numpy as np
-from lerobot.policies.pi0.modeling_pi0 import PI0FastPolicy
+from lerobot.policies.pi0_fast.modeling_pi0_fast import PI0FastPolicy
 
 model_id = "lerobot/pi0fast-base"
 model = PI0FastPolicy.from_pretrained(model_id)