Update app.py

Added Docstring

app.py

@@ -330,15 +330,15 @@ def fetch_latest_arxiv_papers(keywords: list, num_results: int = 5) -> list:
 
     Args:
         keywords (list): A list of keywords to search for relevant research papers.
-        num_results (int): The number of top-ranked papers to return.
+        num_results (int, optional): The number of top-ranked papers to return. Defaults to 5.
 
     Returns:
         list: A list of dictionaries containing:
-            - "title": The title of the paper.
-            - "authors": Authors of the paper.
-            - "year": Year of publication.
-            - "abstract": Short summary of the paper.
-            - "link": URL to the full paper.
+            - "title" (str): The title of the paper.
+            - "authors" (str): The authors of the paper.
+            - "year" (str): The year of publication.
+            - "abstract" (str): A summary of the paper.
+            - "link" (str): A URL to the full paper.
     """
     try:
         query = "+AND+".join([f"all:{kw}" for kw in keywords])