Update tokenizer_config.json

tokenizer_config.json

@@ -247,7 +247,7 @@
   "model_max_length": 1000000000000000019884624838656,
   "pad_token": "<|im_end|>",
   "tokenizer_class": "GPTNeoXTokenizer",
-  "unk_token": "<|endoftext|>"
+  "unk_token": "<|endoftext|>",
   "vocab_size": 49152
 }