Document the NG0904 error #71092

@Component({
  selector: 'app-root',
  template: ` <iframe [src]="sanitized"></iframe> `,
})
export class App {
  readonly url =
    'data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjxzY3JpcHQ+YWxlcnQoJ1hTUycpPC9zY3JpcHQ+PC9zdmc+';
  private readonly sanitizer = inject(DomSanitizer);
  sanitized = this.sanitizer.sanitize(SecurityContext.URL, this.url);
}