Added LANDR to sites.yaml showcase, as suggested in #9315 (#9317)
Added LANDR to sites.yaml showcase, as suggested in #9315 (#9317)

* Update sites.yaml, added LANDR

added the LANDR site, as suggested in #9315

* fixed whitespace

* fixed yaml formatting

ChristopherBiscardi/gatsby,mingaldrichgan/gatsby,0x80/gatsby,ChristopherBiscardi/gatsby,gatsbyjs/gatsby,gatsbyjs/gatsby,gatsbyjs/gatsby,ChristopherBiscardi/gatsby,ChristopherBiscardi/gatsby,gatsbyjs/gatsby,gatsbyjs/gatsby,0x80/gatsby,0x80/gatsby,mingaldrichgan/gatsby,gatsbyjs/gatsby,mingaldrichgan/gatsby