docs: update readme

Signed-off-by: Charles Chin <eallion.s+github@gmail.com>

Author: eallion

README.md

@@ -6,7 +6,6 @@
 [![GitHub issues](https://img.shields.io/github/issues/eallion/uBlacklist-subscription-compilation?logo=GitHub&color=4ec100&style=flat)](https://github.com/eallion/uBlacklist-subscription-compilation/issues/new/choose) ![Visitors](https://visitor-badge.laobi.icu/badge?page_id=eallion.uBlacklist-subscription-compilation)
 
 > 订阅源地址：`https://git.io/ublacklist`  
-> 备用地址（DartNode）：`https://ublacklist.eallion.com/ublacklist.txt`
 
 这是一个 uBlacklist 插件的订阅地址合集，搜集了网上大部分的订阅地址合并成一个。  
 通过 [Github Actions](https://github.com/eallion/uBlacklist-subscription-compilation/actions/workflows/go.yml) 每周自动更新一次。