Update dependencies - spring boot 4 and angular 21 (#10)

Co-authored-by: Florian THIERRY
Reviewed-on: florian/codiki-hexagonal#10

frontend/src/app/pages/search-publications/search-publications.component.ts

@@ -11,7 +11,6 @@ import { SearchPublicationsService } from "./search-publications.service";
     selector: 'app-search-publications',
     templateUrl: './search-publications.component.html',
     styleUrl: './search-publications.component.scss',
-    standalone: true,
     imports: [CommonModule, MatProgressSpinner, PublicationListComponent],
     providers: [SearchPublicationsService]
 })