Update app.py

app.py

@@ -40,7 +40,7 @@ def generate(
     chat_history: list[tuple[str, str]],
     max_new_tokens: int = 1024,
     temperature: float = 0.1,
-    top_p: float = 0.9,
+    top_p: float = 0.4,
     top_k: int = 3,
     repetition_penalty: float = 1.4,
 ) -> Iterator[str]: