swap action tokenizer for transformer v5

config.json

@@ -55,7 +55,7 @@
     "max_state_dim": 32,
     "max_action_tokens": 256,
     "text_tokenizer_name": "google/paligemma-3b-pt-224",
-    "action_tokenizer_name": "physical-intelligence/fast",
+    "action_tokenizer_name": "lerobot/fast-action-tokenizer",
     "temperature": 0.0,
     "max_decoding_steps": 256,
     "fast_skip_tokens": 128,