Disable bos token

Hello 🙂,

Lets disable bos as according to line 8 in config.json:

https://huggingface.co./Infinigence/Megrez-3B-Instruct/blob/main/config.json#L8

Thank you

tokenizer_config.json

@@ -1,4 +1,5 @@
 {
+  "add_bos_token": false,
   "added_tokens_decoder": {
     "120000": {
       "content": "<|eos|>",