update zh-cn/application-dev/database/data-persistence-by-preferences.md.

Signed-off-by: N 葛亚芳 <geyafang@huawei.com>

update zh-cn/application-dev/database/data-persistence-by-preferences.md.
Signed-off-by: N 葛亚芳 <geyafang@huawei.com>
c30f5317 · 葛亚芳 · Gitee · 6e40d968 · c30f5317
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 针对用户首选项开发，有以下相关实例可供参考：

+- [游戏2048（ArkTS）（API9）](https://gitee.com/openharmony/applications_app_samples/tree/master/code/Solutions/Game/Game2048)
+
 - [图案密码锁（ArkTS）（API9）](https://gitee.com/openharmony/applications_app_samples/tree/master/code/Solutions/Tools/PatternLock)

 - [首选项（ArkTS）（API9）](https://gitee.com/openharmony/applications_app_samples/tree/master/code/BasicFeature/DataManagement/Preferences)