Update app.py

app.py

@@ -16,7 +16,7 @@ def get_time_with_context(arg1:str, arg2:int)-> str: #it's import to specify the
         timezone: A valid timezone string (e.g., 'America/New_York', 'Asia/Tokyo').
     
     """
-    return: 
+    Returns: 
         A string with the current time and contextual greeting message.
 
     try: