Fix allowedAttributes in sanitizeHtml usage

Author: ruibaby

packages/comment-widget/src/base-comment-item.ts

@@ -124,7 +124,10 @@ export class BaseCommentItem extends LitElement {
         <div class="item-content mt-2.5 space-y-2.5 content">
           <slot name="pre-content"></slot>${unsafeHTML(
             sanitizeHtml(this.content, {
-              allowedAttributes: { code: ['class'] },
+              allowedAttributes: {
+                ...sanitizeHtml.defaults.allowedAttributes,
+                code: ['class'],
+              },
             })
           )}
         </div>