add Republic of China mirror

Author: ryosukeeeeee

docs/rookie/basic_install.md

@@ -141,6 +141,7 @@ Server = https://mirrors.tuna.tsinghua.edu.cn/archlinux/$repo/os/$arch
 > 如果你在安装 arch linux 时的网络已经处于代理模式下，可以选择一个与你代理位置较近的，非威权国家的镜像源来使用。如果你在安装 arch linux 时的网络环境没有代理，那么在安装结束后，需要尽快更换一个非威权国家的镜像源来使用。如下列举一些较为优质的国际源。
 
 ```bash
+Server = https://mirror.archlinux.tw/ArchLinux/$repo/os/$arch   #东亚地区:中华民国
 Server = https://mirror.0xem.ma/arch/$repo/os/$arch    #北美洲地区:加拿大
 Server = https://mirror.aktkn.sg/archlinux/$repo/os/$arch    #东南亚地区:新加坡
 Server = https://archlinux.uk.mirror.allworldit.com/archlinux/$repo/os/$arch    #欧洲地区:英国

docs/uk/rookie/basic_install.md

@@ -141,6 +141,7 @@ If it's not as fast, you can manually specify another mirror source. For a compl
 > If your network is already in proxy mode when you install arch linux, you can choose a mirror source from a non-authoritarian country that is close to your proxy location to use. If there is no proxy in the network environment when you install arch linux, then after the installation, you need to replace the mirror source of a non-authoritative country as soon as possible to use it. Some of the more high-quality international sources are listed below.
 
 ```bash
+Server = https://mirror.archlinux.tw/ArchLinux/$repo/os/$arch   #East Asia: Republic of China
 Server = https://mirror.0xem.ma/arch/$repo/os/$arch #North America:Canada
 Server = https://mirror.aktkn.sg/archlinux/$repo/os/$arch #Southeast Asia:Singapore
 Server = https://archlinux.uk.mirror.allworldit.com/archlinux/$repo/os/$arch #Europe Region: UK