public: update quick start (no token)

README.md

@@ -152,11 +152,7 @@ pipe fitting, hex bolt, stepped shaft, pulley, gusset, collar, and U-channel.
 ```python
 from datasets import load_dataset
 
-# Load private repository using access token
-dataset = load_dataset(
-    "tryforge/pni-3d-benchmark",
-    use_auth_token="YOUR_READ_ONLY_TOKEN",
-)
+dataset = load_dataset("tryforge/pni-3d-benchmark")
 
 # Inspect a sample part family
 sample = dataset["train"][0]