Update app.py

app.py

@@ -14,7 +14,7 @@ def search_arxiv(query: str, max_results: int = 5) -> str:
 
     Args:
         query (str): The topic or keywords to search for.
-        max_results (int): Number of papers to fetch.
+        max_results (int, optional): The maximum number of papers to retrieve. Defaults to 5.
 
     Returns:
         str: A formatted list of found papers with titles, summaries, and links.