Update tokenizer_config.json (#2)

- Update tokenizer_config.json (3451d4b47f0825ee94432ca1752bbb9ba780989b)


Co-authored-by: Tiezhen WANG <xianbao@users.noreply.huggingface.co>

tokenizer_config.json

@@ -4,6 +4,6 @@
   "clean_up_tokenization_spaces": false,
   "eos_token": "<|endoftext|>",
   "model_max_length": 4096,
-  "tokenizer_class": "GPT3_5Tokenizer",
+  "tokenizer_class": "GPT2TokenizerFast",
   "unk_token": "<|endoftext|>"
 }