Add default chat template to tokenizer_config.json

tokenizer_config.json

@@ -45,5 +45,6 @@
   "sp_model_kwargs": {},
   "tokenizer_class": "GPTSw3Tokenizer",
   "truncation_side": "left",
-  "unk_token": "<unk>"
-}
+  "unk_token": "<unk>",
+  "chat_template": "{{ eos_token }}{{ bos_token }}{% for message in messages %}{% if message['role'] == 'user' %}{{ 'User: ' + message['content']}}{% else %}{{ 'Bot: ' + message['content']}}{% endif %}{{ message['text'] }}{{ bos_token }}{% endfor %}Bot:"
+}