Update app.py

[karpachevs]

Fixed URL Endpoint to weekly bonus

[karpachevs]

[12.01.26-03:00] Server-Antwort: {

"statusCode": 404,

"errorCode": 4001,

"errorMessage": "[0401-4001]: Item with sku = 'com.rockbite.zombieoutpost.webshop.weeklybonus2' not found",

"transactionId": "93d54471cc9e0745febd13db5661d3ca"

}