Update app.py

Small update to try a rebuild

app.py

@@ -41,7 +41,7 @@ def webpage_header_get(url:str)-> str: #it's import to specify the return type
     #Keep this format for the description / args / args description but feel free to modify the tool
     """A simple function to grab header of a webpage.  Can be passed into webpage_contents_get if desired.
     Args:
-        url: The URL the contents of which the tool will get
+        url: string The URL the contents of which the tool will get
     """
     response = requests.get(url)
     return response.headers