Update app.py

app.py

@@ -17,7 +17,7 @@ def get_current_weather_tool(location:str)-> str: #it's import to specify the re
     Args:
         location: A string representing a city (e.g., Paris)
     """
-    response = requests.request("GET", f"https://weather.visualcrossing.com/VisualCrossingWebServices/rest/services/timeline/{location}?unitGroup=us&include=current&key=AUQWTCLEDRS6JF5HB75YCFGBE&contentType=json")
+    response = requests.request("GET", f"https://weather.visualcrossing.com/VisualCrossingWebServices/rest/services/timeline/{location}?unitGroup=metric&include=current&key=AUQWTCLEDRS6JF5HB75YCFGBE&contentType=json")
     if response.status_code!=200:
       return('Unexpected Status code: ', response.status_code)