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

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

frontend/src/app/components/confirmation-dialog/confirmation-dialog.component.ts

@@ -9,7 +9,6 @@ export interface ConfirmationDialogData {
 
 @Component({
     selector: 'app-confirmation-dialog',
-    standalone: true,
     templateUrl: './confirmation-dialog.component.html',
     styleUrl: './confirmation-dialog.component.scss',
     imports: [MatRippleModule]