Update branding

gatsby-config.js

@@ -31,7 +31,7 @@ module.exports = {
         start_url : `/`,
         background_color : `#ffffff`,
         display : `standalone`,
-        icon: `static/favicon.png`,
+        icon : `static/favicon.ico`,
       },
     },
     `gatsby-plugin-sitemap`,

src/@rocketseat/gatsby-theme-docs/components/Logo.js

 import styled from '@emotion/styled';
 
-import logo from '../../../docs/anl_eic_logo_3.png';
+import logo from '../../../docs/eicweb-logo.png';
 
 export default styled.div`
   width: 260px;