Update app.py

app.py

@@ -15,7 +15,7 @@ def get_birth_stone(month: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 tool that takes a month string as input. It outputs the birthstone of that month.
     Args:
-        dob: A string representing a month of the year
+        month: A string representing a month of the year
     """
 
     birthstones = {