Fix tokenizer_config.json special token names

tokenizer_config.json

@@ -1,9 +1,11 @@
 {
   "tokenizer_class": "PreTrainedTokenizerFast",
   "model_max_length": 512,
-  "pad_token": "[PAD]",
-  "mask_token": "[MASK]",
-  "cls_token": "[CLS]",
-  "sep_token": "[SEP]",
-  "unk_token": "[UNK]"
-}
+  "bos_token": "<|start|>",
+  "eos_token": "<|end|>",
+  "pad_token": "<|pad|>",
+  "unk_token": "<|unk|>",
+  "cls_token": "<|cls|>",
+  "sep_token": "<|sep|>",
+  "mask_token": "<|mask|>"
+}