update zh-cn/application-dev/reference/apis/js-apis-rpc.md.

Signed-off-by: N张泊远yg <zhangboyuan1@huawei.com>
Signed-off-by: N张泊远yg <zhangboyuan1@huawei.com>

zh-cn/application-dev/reference/apis/js-apis-rpc.md

@@ -6647,6 +6647,8 @@ addDeathRecipient(recipient: DeathRecipient, flags: number): boolean
 
 **示例：**
 
+  获取服务
+
   ```ts
   import FA from "@ohos.ability.featureAbility";
   let proxy;