Update app.py

app.py

@@ -13,7 +13,7 @@ def exchange(amount_uah: float)-> 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
     """Converts the amount in hryvnia (UAH) to dollars (USD) at the current NBU exchange rate.
     Args:
-        amount_uah (float): The amount in hryvnia to be converted.
+        amount_uah: The amount in hryvnia to be converted.
 
     """
     response = requests.get("https://bank.gov.ua/NBUStatService/v1/statdirectory/exchange?json")