Update app.py

app.py

@@ -46,7 +46,7 @@ model = HfApiModel(
     max_tokens=2096,
     temperature=0.5,
     model_id='Qwen/Qwen2.5-Coder-32B-Instruct',
-    custom_role_conversions=AI Air Quality Agent,
+    custom_role_conversions='AI Air Quality Agent',
 )
 
 # dobavlen tool