[DURACOM-191] Fix submission-import-external-preview.component

Author: atarix83

src/app/submission/import-external/import-external-preview/submission-import-external-preview.component.ts

@@ -1,3 +1,4 @@
+import { NgFor } from '@angular/common';
 import {
   Component,
   Input,
@@ -29,6 +30,7 @@ import { SubmissionImportExternalCollectionComponent } from '../import-external-
   styleUrls: ['./submission-import-external-preview.component.scss'],
   templateUrl: './submission-import-external-preview.component.html',
   imports: [
+    NgFor,
     TranslateModule,
   ],
   standalone: true,