fixed 52d91fe4 from https://gitee.com/wangyongzhong2/docs/pulls/10077

update zh-cn/application-dev/reference/apis/js-apis-system-cipher.md.
Signed-off-by: N王永忠 <wangyongzhong2@huawei.com>

zh-cn/application-dev/reference/apis/js-apis-system-cipher.md

@@ -9,7 +9,7 @@
 
 
 ```js
-import cipher from '@system.cipher'
+import cipher from '@system.cipher';
 ```