fix(schematics): fix home import without placeholder (#966)

Author: Lipata

packages/igx-templates/igx-ts/projects/empty/files/src/app/home/home.component.scss

@@ -1,4 +1,4 @@
-@use '<%=igxPackage%>/theming' as *;
+@use 'igniteui-angular/theming' as *;
 
 %content-display {
   width: 100%;