fix: remove image from mirror service news

Author: faweizhao26

i18n/zh-CN/docusaurus-plugin-content-pages/news/ivorysql-china-mirror-service.mdx

@@ -113,8 +113,6 @@ import useBaseUrl from '@docusaurus/useBaseUrl';
         </ul>
       </ul>
 
-      <img className="post-cover" src={useBaseUrl('/img/news/ivorysql-china-mirror-service.png')} alt="国内镜像服务上线" />
-
       <h2 id="registry">镜像仓库地址</h2>
       <p>本次上线的<a href="https://registry.highgo.com/" target="_blank" rel="noopener noreferrer">镜像仓库地址</a>为：<code>https://registry.highgo.com/</code></p>
       <p>该镜像服务面向国内网络环境优化，适合开发测试、演示验证、CI 构建以及容器化部署场景中快速拉取数据库相关镜像。</p>

src/pages/news/ivorysql-china-mirror-service.mdx

@@ -99,8 +99,6 @@ import useBaseUrl from '@docusaurus/useBaseUrl';
         <li><strong>Operator & Companion</strong>: ivory-operator, postgis, pgadmin, pgbackrest, pgbouncer, postgres-exporter</li>
       </ul>
 
-      <img className="post-cover" src={useBaseUrl('/img/news/ivorysql-china-mirror-service.png')} alt="China Mirror Service" />
-
       <h2 id="registry">Registry Address</h2>
       <p><a href="https://registry.highgo.com/" target="_blank" rel="noopener noreferrer">Registry URL</a>: <code>https://registry.highgo.com/</code></p>