chore: add tencent cloudbase #no-ticket

Author: juvenn

docs/sdk/announcements/sunset-export.mdx

@@ -69,7 +69,7 @@ Class](/sdk/storage/guide/rest/#遍历-class)。
 
 <Conditional region="cn">
 
-<h2>腾讯云 CloudBase</h2>
+## 腾讯云 CloudBase
 
 我们推荐使用腾讯云 CloudBase 作为 LeanCloud 的替代方案。CloudBase 提供数据库、云函数、云存储、身份认证等与 LeanCloud
 类似的能力，并配备完整迁移指南及智能迁移脚本，支持自动数据格式转换。

src/docComponents/conditional.tsx

@@ -1,23 +1,21 @@
 import { BRAND, REGION } from "../constants/env";
+import React, { type ReactNode } from "react";
 
 interface ConditionalProps {
-  children: React.ReactElement[];
+  children?: ReactNode;
   brand?: string;
   region?: string;
   if?: boolean;
 }
 
 export function Conditional(props: ConditionalProps) {
-  
-  
-
   const { children, brand, region } = props;
   if (
     (!brand || brand === BRAND) &&
     (!region || region === REGION) &&
     (props.if === undefined || props.if)
   ) {
-    return children;
+    return <>{children}</>;
   } else {
     return null;
   }