added missing starter page link in docs/layout.md
added missing starter page link in docs/layout.md

oyjt/AdminLTE,almasaeed2010/AdminLTE,oyjt/AdminLTE,slachiewicz/AdminLTE,garrettwong/AdminLTE,garrettwong/AdminLTE,oyjt/AdminLTE,slachiewicz/AdminLTE,almasaeed2010/AdminLTE