message: [skip ci] use primer.github.io favicon
diff: @@ -22,7 +22,7 @@ module.exports = ({
  <link rel='stylesheet' href='https://unpkg.com/primer-product/build/build.css'/>
  <link rel='stylesheet' href='https://unpkg.com/primer-tooltips/build/build.css'/>
  <link rel='stylesheet' href='https://unpkg.com/primer-utilities/build/build.css'/>
  - <link rel='icon' href='assets/favicon.png' />
  + <link rel='icon' href='https://primer.github.io/favicon.png' />
  <link rel='apple-touch-icon' href='assets/apple-touch-icon.png' />
  <meta name='og:title' content='Primer React' />
  <meta name='description' content='Primer components built with React.js.' />
  