use reflector to find fastest mirror

.github/workflows/BuildArchIso.yml

@@ -14,7 +14,9 @@ jobs:
         cd /build
         useradd builduser -m
         passwd -d builduser
-        pacman -Syu --noconfirm --needed sudo git base-devel
+        pacman -Syu --noconfirm --needed reflector
+        reflector -f 5 --sort rate -p https --save /etc/pacman.d/mirrorlist
+        pacman -S --noconfirm --needed sudo git base-devel
         printf 'builduser ALL=(ALL) ALL\\n' | tee -a /etc/sudoers
         chown -R builduser:builduser ./
         sudo -u builduser bash -c './prepare.sh'

archiso/airootfs/root/.automated_script.sh

@@ -39,6 +39,7 @@ Server = https://github.com/Redecorating/archlinux-t2-packages/releases/download
 Server = https://mirror.funami.tech/arch-mact2/os/x86_64
 SigLevel = Optional TrustAll
 EOF
+    sudo reflector -f 5 --sort rate -p https --save /etc/pacman.d/mirrorlist
     sudo pacman-key --init
     yes | sudo pacman-key --recv-keys DEB7F121BAAA6F4E --keyserver pgp.mit.edu
     yes | sudo pacman-key --lsign-key DEB7F121BAAA6F4E