Add OS 20 prevention message

[HikariCalyx]

虽然不知道还有没有人用到这个Homebrew。
这个改动主要是防止一般人好奇在HOS20和以上切回国行，顺带重新编译来支持最新的libnx。

[CaiMiao]

as per current state of devkitPro project, all my available ip addresses have been actively blocked by Cloudflare firewall policy deployed on their centralized distribution server.
Therefore, I can't validate any PRs and implement any desirable changes for the project, and all PRs/issues should be considered stale indefinitely, until such restriction get lifted or proper mitigation goes live.

由于devkitPro的中心化分发服务器挡掉我所有可用的IP，我无法更新工具链到最新状态，因此本人名下几乎所有dkp项目在该类限制撤除前，均永久性地无法维护。请知悉。

[zimolab]

as per current state of devkitPro project, all my available ip addresses have been actively blocked by Cloudflare firewall policy deployed on their centralized distribution server. Therefore, I can't validate any PRs and implement any desirable changes for the project, and all PRs/issues should be considered stale indefinitely, until such restriction get lifted or proper mitigation goes live.

由于devkitPro的中心化分发服务器挡掉我所有可用的IP，我无法更新工具链到最新状态，因此本人名下几乎所有dkp项目在该类限制撤除前，均永久性地无法维护。请知悉。

请问官方现在给你解除访问限制了吗，我和你遇到了一样的情况，不知道发邮件给他们是否有用？