I tried installing the ckeditor the other toolbar are working except the Underline , how do we add an in angular ckeditor an Underline tool bar ?

"@ckeditor/ckeditor5-angular": "^3.0.0", "@ckeditor/ckeditor5-build-classic": "^33.0.0",

#html code

  <ckeditor [(ngModel)]="tradeAreaNotes" [editor]="Editor" [config]="config"></ckeditor>

#ts config code

  public Editor = ClassicEditor;
  config = {
    toolbar: [
      'undo',
      'redo',
      '|',
      'heading',
      'fontFamily',
      'fontSize',
      '|',
      'bold',
      'italic',
      'underline',
      'fontColor',
      'fontBackgroundColor',
      'highlight',
      '|',
      'link',
      'CKFinder',
      'imageUpload',
      'mediaEmbed',
      '|',
      'alignment',
      'bulletedList',
      'numberedList',
      '|',
      'indent',
      'outdent',
      '|',
      'insertTable',
      'blockQuote',
      'specialCharacters'
    ],
    language: 'id',
    image: {
      toolbar: [
        'imageTextAlternative',
        'imageStyle:full',
        'imageStyle:side'
      ]
    },
  }