文档里这段描述不对

[lovelyJason]

Describe the bug

文档里这段描述不对，经我测试，反而是expandedRowRender能用能正常显示好吧，expandColumnTitle不能用，一用就报错，并且他是和expandedRowRender同时都使用了就会报错

Reproduction

      <BasicTable @register="registerTable">
        <template #bodyCell="{ column, record }">
          <template v-if="column.key === 'action'"> 123</template>
        </template>
        <template #expandedRowRender="{ record }">
          <div class="px-4 py-1 text-gray-800 bg-gray-400">
            <p>邮件内容: </p>
            <p v-for="item in record.emailCustomTemplateLanguages" :key="item.languageName">
              <span>{{ item.body }}</span>
            </p>
          </div>
        </template>
        <template #expandColumnTitle>
          <span style="color: red">More</span>
        </template>
      </BasicTable>

System Info

• Operating System: windows10
• Node version: v18.18.0
• pnpm version: 8.15.4