Update tokenizer_config.json

tokenizer_config.json

@@ -16,5 +16,8 @@
   "extra_special_tokens": {},
   "model_max_length": 1024,
   "tokenizer_class": "GPT2Tokenizer",
-  "unk_token": "<|endoftext|>"
+  "unk_token": "<|endoftext|>",
+   "auto_map": {
+    "AutoTokenizer": ["transformers.GPT2TokenizerFast", null]
+  },
 }