OZG-1817 fix unit tests

goofy-client/libs/vorgang-detail/src/lib/vorgang-detail-page/vorgang-detail-area/vorgang-detail-header/vorgang-detail-header.component.spec.ts

@@ -6,6 +6,7 @@ import { UserProfileInVorgangContainerComponent } from 'libs/user-profile/src/li
 import { createVorgangWithEingangResource } from 'libs/vorgang-shared/test/vorgang';
 import { MockComponent } from 'ng-mocks';
 import { VorgangDetailHeaderComponent } from './vorgang-detail-header.component';
+import { MatIcon } from '@angular/material/icon';
 
 describe('VorgangDetailHeaderComponent', () => {
 	let component: VorgangDetailHeaderComponent;
@@ -19,6 +20,7 @@ describe('VorgangDetailHeaderComponent', () => {
 				VorgangDetailHeaderComponent,
 				EnumToLabelPipe,
 				HasLinkPipe,
+				MatIcon,
 				MockComponent(UserProfileInVorgangContainerComponent),
 				MockComponent(StatusDotComponent),
 				MockComponent(AktenzeichenComponent),