update docs/navbar-search.md with target config option
update docs/navbar-search.md with target config option

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