github serves styles with media="all" now

see

```
<link href="https://a248.e.akamai.net/assets.github.com/assets/github-8c237cc402e3d4bc024750691ccce4fd5eddee2e.css" media="all" rel="stylesheet" type="text/css" />
    <link href="https://a248.e.akamai.net/assets.github.com/assets/github2-b3dae45acdd45e0a713958d12bb8a0ad266f56e7.css" media="all" rel="stylesheet" type="text/css" />
```