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

@@ -6685,7 +6685,7 @@ addDeathRecipient(recipient: DeathRecipient, flags: number): boolean
 
 ### unregisterDeathRecipient<sup>9+</sup>
 
-unregisterDeathRecipient(recipient: DeathRecipient, flags: number): void
+unregisterDeathRecipient(recipient: DeathRecipient, flags: number): boolean
 
 注销用于接收远程对象死亡通知的回调。