Update alpine-wireguard.sh (#8160)

Author: tremor021

ct/alpine-wireguard.sh

@@ -32,7 +32,7 @@ function update_script() {
   if [[ -d /etc/wgdashboard/src ]]; then
     msg_info "update WGDashboard"
     cd /etc/wgdashboard/src
-    $STD echo "y" | ./wgd.sh update
+    echo "y" | ./wgd.sh update >/dev/null 2>&1
     $STD ./wgd.sh start
     msg_ok "WGDashboard updated"
   fi