docs: update benchmark tool documentation (#1194)

Author: leto-bbq

src/.vuepress/sidebar/V2.0.x/zh-Table.ts

@@ -155,6 +155,7 @@ export const zhSidebar = {
       children: [
         { text: '命令行工具', link: 'CLI_apache' },
         { text: '监控工具', link: 'Monitor-Tool_apache' },
+        { text: '测试工具', link: 'Benchmark' },
         { text: '集群管理工具', link: 'Maintenance-Tool_apache' },
         { text: '数据导入导出', collapsible: true,
           children: [