ci: change alpine linux url

Author: blattersturm

code/tools/ci/build_server_proot.sh

@@ -17,7 +17,7 @@ curl -s -d "$json" "$TG_WEBHOOK" || true
 curl -s -d "$json" "$DISCORD_WEBHOOK" || true
 
 # get an alpine rootfs
-curl -sLo alpine-minirootfs-3.8.0-x86_64.tar.gz http://dl-cdn.alpinelinux.org/alpine/edge/releases/x86_64/alpine-minirootfs-3.8.0-x86_64.tar.gz
+curl -sLo alpine-minirootfs-3.8.0-x86_64.tar.gz http://dl-cdn.alpinelinux.org/alpine/v3.8/releases/x86_64/alpine-minirootfs-3.8.0-x86_64.tar.gz
 
 # get our patched proot build
 # source code: https://runtime.fivem.net/build/proot-v5.1.1.tar.gz