Update app.py

app.py

@@ -212,7 +212,7 @@ def generate_podcast(input_type: str, input: str):
             - "Text": Raw text input to convert directly
 
         input (str): The actual input content matching the specified input_type:
-            - For "Document": Document URL (e.g. "https://example.com/doc.pdf")
+            - For "Document": Document or arxiv URL (e.g. "https://example.com/doc.pdf")
             - For "Link": Webpage URL (e.g. "https://example.com/article")
             - For "Text": Plain text content