fix: comment render nest style bug

Author: zkwolf

components/comment/__tests__/__snapshots__/demo.test.js.snap

@@ -124,7 +124,7 @@ exports[`renders ./components/comment/demo/nested.md correctly 1`] = `
       </ul>
     </div>
   </div>
-  <div class="undefined-nested">
+  <div class="ant-comment-nested">
     <div class="ant-comment">
       <div class="ant-comment-inner">
         <div class="ant-comment-avatar"><span class="ant-avatar ant-avatar-circle ant-avatar-image"><img src="https://zos.alipayobjects.com/rmsportal/ODTLcjxAfvqbxHnVXCYX.png" alt="Han Solo"></span></div>
@@ -141,7 +141,7 @@ exports[`renders ./components/comment/demo/nested.md correctly 1`] = `
           </ul>
         </div>
       </div>
-      <div class="undefined-nested">
+      <div class="ant-comment-nested">
         <div class="ant-comment">
           <div class="ant-comment-inner">
             <div class="ant-comment-avatar"><span class="ant-avatar ant-avatar-circle ant-avatar-image"><img src="https://zos.alipayobjects.com/rmsportal/ODTLcjxAfvqbxHnVXCYX.png" alt="Han Solo"></span></div>

components/comment/index.jsx

@@ -30,9 +30,7 @@ const Comment = {
       const actionList = actions.map((action, index) => <li key={`action-${index}`}>{action}</li>);
       return actionList;
     },
-    renderNested(children) {
-      const { prefixCls } = this.$props;
-
+    renderNested(prefixCls, children) {
       return <div class={`${prefixCls}-nested`}>{children}</div>;
     },
   },
@@ -85,7 +83,7 @@ const Comment = {
     return (
       <div class={prefixCls} {...{ on: this.$listeners }}>
         {comment}
-        {children ? this.renderNested(children) : null}
+        {children ? this.renderNested(prefixCls, children) : null}
       </div>
     );
   },