fixed 42c507fe from https://gitee.com/liminjie10/docs/pulls/14426

蓝区master:修改setValue接口的示例代码
Signed-off-by: Nliminjie10 <liminjie10@huawei.com>

zh-cn/application-dev/reference/apis/js-apis-settings.md

@@ -328,6 +328,8 @@ import featureAbility from '@ohos.ability.featureAbility';
 //更新数据项亮度的值（该数据项在数据库中已存在，故setValue方法将更新该数据项的值）
 let uri = settings.getUriSync(settings.display.SCREEN_BRIGHTNESS_STATUS);
 let helper = featureAbility.acquireDataAbilityHelper(uri);
+//@ts-ignore
+//此处数据项值的类型为string
 settings.setValue(helper, settings.display.SCREEN_BRIGHTNESS_STATUS, '100', (status) => {
     console.log('Callback return whether value is set.');
 });
@@ -365,6 +367,8 @@ import featureAbility from '@ohos.ability.featureAbility';
 //更新数据项亮度的值（该数据项在数据库中已存在，故setValue方法将更新该数据项的值）
 let uri = settings.getUriSync(settings.display.SCREEN_BRIGHTNESS_STATUS);
 let helper = featureAbility.acquireDataAbilityHelper(uri);
+//@ts-ignore
+//此处数据项值的类型为string
 settings.setValue(helper, settings.display.SCREEN_BRIGHTNESS_STATUS, '100').then((status) => {
     console.log('Callback return whether value is set.');
 });