Fix tokenizer to not produce token_type_ids (ModernBERT compatibility)

tokenizer_config.json

@@ -1,6 +1,7 @@
 {
   "additional_special_tokens": null,
   "backend": "tokenizers",
+  "model_input_names": ["input_ids", "attention_mask"],
   "bos_token": "<|start|>",
   "cls_token": "<|cls|>",
   "eos_token": "<|end|>",