Fix distance between masthead and the icon (#5068)
Fix distance between masthead and the icon (#5068)

On mobile, the masthead is overlapping with the Gatsby icon.
gatsbyjs/gatsby,0x80/gatsby,mingaldrichgan/gatsby,0x80/gatsby,fk/gatsby,fk/gatsby,gatsbyjs/gatsby,ChristopherBiscardi/gatsby,mingaldrichgan/gatsby,gatsbyjs/gatsby,gatsbyjs/gatsby,gatsbyjs/gatsby,gatsbyjs/gatsby,ChristopherBiscardi/gatsby,mingaldrichgan/gatsby,ChristopherBiscardi/gatsby,fk/gatsby,0x80/gatsby,ChristopherBiscardi/gatsby