docs(router): fix Router.forRoot -> RouterModule.forRoot (#3172)
docs(router): fix Router.forRoot -> RouterModule.forRoot (#3172)


angular/angular.io,angular/angular-cn,chalin/angular.io,angular/angular-ko,onyoon7/angular-ko,chalin/angular.io,angular/angular-ko,IdeaBlade/angular.io,chalin/angular.io,angular/angular-cn,chalin/angular.io,juleskremer/angular.io,juleskremer/angular.io,angular/angular-ko,IdeaBlade/angular.io,IdeaBlade/angular.io,onyoon7/angular-ko,IdeaBlade/angular.io,angular/angular-cn,juleskremer/angular.io,IdeaBlade/angular.io,onyoon7/angular-ko,chalin/angular.io,juleskremer/angular.io,angular/angular-cn,onyoon7/angular-ko,angular/angular.io,onyoon7/angular-ko,juleskremer/angular.io,angular/angular.io,angular/angular.io,angular/angular-ko,angular/angular.io,angular/angular-ko,angular/angular-cn