Update mlc-chat-config.json (#1)

- Update mlc-chat-config.json (4f9109bb7f74c14a394a61076cdf9b28554856e1)

mlc-chat-config.json

@@ -27,11 +27,11 @@
   "attention_sink_size": -1,
   "tensor_parallel_shards": 1,
   "pipeline_parallel_stages": 1,
-  "temperature": 1.0,
+  "temperature": 0.9,
   "presence_penalty": 0.0,
   "frequency_penalty": 0.0,
   "repetition_penalty": 1.0,
-  "top_p": 1.0,
+  "top_p": 0.2,
   "tokenizer_files": [
     "tokenizer.json",
     "vocab.json",