iOS 14 Notification not show the image

Hi I develop on iOS and follow through this instruction

https://www.avanderlee.com/swift/rich-notifications/

and my "notification.apns" look like this

{
"Simulator Target Bundle": "com.xxxxxxxxxxxxxxxxx",
"aps": {
    "category": "content_added_notification",
    "alert": {
        "title": "Photos",
        "body": "Antoine added something new - take a look"
    },
    "mutable-content": 1
},
"image_url": "https://upload.wikimedia.org/wikipedia/commons/d/d5/Basketball_Ball_Icon.png" 
}

And notification show like this.

What wrong with it??