added sitemap location to robots file
added sitemap location to robots file



Former-commit-id: 8f227afab29e5ce842346940b654d152fbbcdbc5
julie-sullivan/phytomine,julie-sullivan/phytomine,julie-sullivan/phytomine,julie-sullivan/phytomine,julie-sullivan/phytomine,julie-sullivan/phytomine,julie-sullivan/phytomine