ability to specify href for logo explicitly

[ghost]

The href use for the logo when using the x-logo extension is the info.contact.url field of the OAS.

<a class="sc-jhAzac bwwUyr" href="https://github.com/Rebilly/ReDoc">
   <img class="sc-bRBYWo ibLsTy" src="https://rebilly.github.io/ReDoc/petstore-logo.png" alt="Petstore logo">
</a>

Could it be possible to specify the href explicitly in the x-logo extension with something like

{
  "info": {
    "version": "1.0.0",
    "title": "Swagger Petstore",
    "x-logo": {
      "url": "https://rebilly.github.io/ReDoc/petstore-logo.png",
      "backgroundColor": "#FFFFFF",
      "altText": "Petstore logo",
      **"href": "https://petstore.com/homepage"**
    }
  }
}

[RomanHotsiy]

This makes sense 👍

PR is welcome!