Update README.md of gatsby-cli
Update README.md of gatsby-cli

Looks like some of the full stops are missing
fabrictech/gatsby,Khaledgarbaya/gatsby,gatsbyjs/gatsby,ChristopherBiscardi/gatsby,mingaldrichgan/gatsby,fabrictech/gatsby,mingaldrichgan/gatsby,0x80/gatsby,danielfarrell/gatsby,fk/gatsby,mickeyreiss/gatsby,gatsbyjs/gatsby,fabrictech/gatsby,danielfarrell/gatsby,mickeyreiss/gatsby,gatsbyjs/gatsby,fk/gatsby,ChristopherBiscardi/gatsby,gatsbyjs/gatsby,Khaledgarbaya/gatsby,danielfarrell/gatsby,Khaledgarbaya/gatsby,0x80/gatsby,ChristopherBiscardi/gatsby,gatsbyjs/gatsby,gatsbyjs/gatsby,ChristopherBiscardi/gatsby,0x80/gatsby,mingaldrichgan/gatsby,mickeyreiss/gatsby,fk/gatsby