fixed 0a58b8a1 from https://gitee.com/ge-yafang/docs/pulls/14194

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

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

@@ -51,7 +51,7 @@ export default {
 
 ## storage.set
 
-get(options: SetStorageOptions): void
+set(options: SetStorageOptions): void
 
 修改缓存中索引对应的值。