哪吒监控公告板

nezha 发布新版本啦！

版本号: v1.6.0
变更日志:
## What's Changed
* small improvements by @uubulb in https://github.com/nezhahq/nezha/pull/958
* feat: new theme nezha-ascii by @hamster1963 in https://github.com/nezhahq/nezha/pull/960