fixed f41cd198 from https://gitee.com/ge-yafang/docs/pulls/8971

update zh-cn/application-dev/reference/apis/js-apis-data-preferences.md.
Signed-off-by: N@ge-yafang <geyafang@huawei.com>
Signed-off-by: N葛亚芳 <geyafang@huawei.com>