Update alpine-adguard.sh

We only overwrite the executable file for AdGuard to update it, all the other files of the tar don't matter.
So there is no need at all to backup the temporary folder and then copy the files back, even simpler isn't it?

ct/alpine-adguard.sh

@@ -25,7 +25,7 @@ var_cpu="1"
 var_ram="256"
 var_os="alpine"
 var_version="3.17"
-variables
+varibles
 color
 catch_errors
 
@@ -88,10 +88,7 @@ while [ "$opt" != "" ]; do
             msg_info "Updating AdguardHome to $VER"
             wget -q "https://github.com/AdguardTeam/AdGuardHome/releases/download/$VER/AdGuardHome_linux_amd64.tar.gz"
             tar -xvf AdGuardHome_linux_amd64.tar.gz &>/dev/null
-            mkdir -p adguard-backup
-            cp -rf /opt/AdGuardHome/AdGuardHome.yaml /opt/AdGuardHome/data adguard-backup/
             cp AdGuardHome/AdGuardHome /opt/AdGuardHome/AdGuardHome
-            cp -r adguard-backup/* /opt/AdGuardHome/
             msg_ok "Updated AdguardHome"
 
             msg_info "Starting AdguardHome"