693.1 Missing X-Content-Type-Options: nosniff is reporting out of scope URL

I noticed in the budget app report we are reporting a gravatar url which is out of scope:

"details": {
                "urls": {
                    "name": "URLs",
                    "type": "list",
                    "items": [
...
                        {
                            "type": "url",
                            "href": "http://budgetapp:8080/app/partials/dashboard.html?1.0.4"
                        },
                        {
                            "type": "url",
                            "href": "https://www.gravatar.com/avatar/b642b4217b34b1e8d3bd915fc65c4452"
                        }
                    ]
                }