fix : return from submit method when pin is empty (#5769)

Co-authored-by: Thomas Rittson <31796059+eliykat@users.noreply.github.com>
Co-authored-by: Thomas Rittson <trittson@bitwarden.com>

libs/angular/src/auth/components/set-pin.component.ts

@@ -34,6 +34,7 @@ export class SetPinComponent implements OnInit {
   async submit() {
     if (Utils.isNullOrWhitespace(this.pin)) {
       this.modalRef.close(false);
+      return;
     }
 
     const pinKey = await this.cryptoService.makePinKey(