Update tokenizer_config.json

tokenizer_config.json

@@ -1 +1 @@
-{"unk_token": "[UNK]", "sep_token": "[SEP]", "pad_token": "[PAD]", "cls_token": "[SEP]", "mask_token": "[MASK]", "xprophetnet_tokenizer": false, "special_tokens_map_file": null, "full_tokenizer_file": null}
+{"unk_token": "[UNK]", "sep_token": "[SEP]", "pad_token": "[PAD]", "mask_token": "[MASK]", "x_sep_token": "[X_SEP]", "cls_token": "[SEP]", "xprophetnet_tokenizer": false, "special_tokens_map_file": null, "full_tokenizer_file": null, "tokenizer_file": null}