use Mistral instead for now

app.py

@@ -136,7 +136,7 @@ convert_id_tool = PMID2PMCIDConverter()
 model = HfApiModel(
 max_tokens=2096,
 temperature=0.5,
-model_id='Qwen/Qwen2.5-Coder-32B-Instruct',# it is possible that this model may be overloaded
+model_id='mistralai/Mistral-7B-Instruct-v0.2',# it is possible that this model may be overloaded
 custom_role_conversions=None,
 )