Update app.py

app.py

@@ -29,7 +29,7 @@ def convert_timezone(time:str, input_timezone:str, output_timezone: str)-> str:
         converted_time = localized_time.astimezone(output_timezone)
         
         # Return formatted string
-        return f"The time in {output_timezone} is: {converted_time.strftime("%Y-%m-%d %H:%M:%S")}"
+        return f'The time in {output_timezone} is: {converted_time.strftime("%Y-%m-%d %H:%M:%S")}'
     except Exception as e:
         return f"Error converting time: {str(e)}"