Update tokenizer_config.json

tokenizer_config.json

@@ -5,9 +5,5 @@
   "unk_token": "<|unk|>",
   "pad_token": "<|pad|>",
   "additional_special_tokens": ["<|user|>", "<|bot|>", "<|system|>"],
-  "chat_template": [
-    {"role": "user", "token": "<|user|>"},
-    {"role": "bot", "token": "<|bot|>"},
-    {"role": "system", "token": "<|system|>"}
-  ]
+  "chat_template": "<|user|>:<|bot|>:<|system|>"
 }