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

Co-authored-by: Florian THIERRY
Reviewed-on: #10

frontend/src/app/components/footer/footer.component.ts

@@ -4,11 +4,10 @@ import { MatTooltipModule } from '@angular/material/tooltip';
 import { RouterModule } from '@angular/router';
 
 @Component({
-  selector: 'app-footer',
-  standalone: true,
-  imports: [MatIconModule, MatTooltipModule, RouterModule],
-  templateUrl: './footer.component.html',
-  styleUrl: './footer.component.scss'
+    selector: 'app-footer',
+    imports: [MatIconModule, MatTooltipModule, RouterModule],
+    templateUrl: './footer.component.html',
+    styleUrl: './footer.component.scss'
 })
 export class FooterComponent {