fix(app-header): shortened import path fails

Author: xidedix

projects/coreui/angular/src/lib/header/app-header.module.ts

@@ -2,7 +2,7 @@ import { CommonModule } from '@angular/common';
 import { NgModule } from '@angular/core';
 import { RouterModule } from '@angular/router';
 
-import { LayoutModule } from '../shared/layout';
+import { LayoutModule } from '../shared/layout/layout.module';
 import { AppHeaderComponent } from './app-header.component';
 
 @NgModule({