Update app-adding-pages-and-layouts.md (#368)
Update app-adding-pages-and-layouts.md (#368)

Fixed link
quasarframework/quasar-framework.org,rstoenescu/quasar-site,rstoenescu/quasar-site,rstoenescu/quasar-site,quasarframework/quasar-framework.org,quasarframework/quasar-framework.org