Change the name & description of gatsbyjs.org (#4713)
Change the name & description of gatsbyjs.org (#4713)

Instead of:
You can now view gatsby-starter-default in the browser.

It’s now:
You can now view gatsbyjs.org in the browser.
mingaldrichgan/gatsby,ChristopherBiscardi/gatsby,mingaldrichgan/gatsby,fk/gatsby,ChristopherBiscardi/gatsby,gatsbyjs/gatsby,gatsbyjs/gatsby,ChristopherBiscardi/gatsby,gatsbyjs/gatsby,0x80/gatsby,gatsbyjs/gatsby,fk/gatsby,0x80/gatsby,gatsbyjs/gatsby,mingaldrichgan/gatsby,gatsbyjs/gatsby,fk/gatsby,ChristopherBiscardi/gatsby,0x80/gatsby