Update chat template

tokenizer_config.json

@@ -111,7 +111,7 @@
     ">>SUFFIX<<",
     ">>MIDDLE<<"
   ],
-  "chat_template": "{% if not add_generation_prompt is defined %}{% set add_generation_prompt = false %}{% endif %}{% for message in messages %}{% if not loop.first %}{% endif %}{% if message['role'] == 'system' %}{{ message['content'] + ' ' }}{% elif message['role'] == 'user' %}{{ 'USER: ' + message['content'] + ' ' }}{% elif message['role'] == 'assistant' %}{{ 'ASSISTANT: ' + message['content'] + '</s>' }}{% endif %}{% endfor %}{% if add_generation_prompt %}{{ 'ASSISTANT:' }}{% endif %}",
+  "chat_template": "{% for message in messages %}{{'<|im_start|>' + message['role'] + '\\n' + message['content'] + '<|im_end|>' + '\\n'}}{% endfor %}",
   "clean_up_tokenization_spaces": true,
   "eos_token": "<|endoftext|>",
   "model_input_names": [