Update nginx version from 1.23.1 to 1.23.4.

install_nginx.sh

@@ -206,7 +206,7 @@ if [[ ! -f /etc/init.d/nginx ]]; then
         sudo systemctl enable nginx
     fi
 fi
-nginx_target_ver="1.23.1"
+nginx_target_ver="1.23.4"
 if [[ $(vercomp "$nginx_ver" "$nginx_target_ver") ==  "<" ]] || [[ "$1" == '--force' ]] || [[ "$install_modsecurity" == "1" ]] || [[ "$install_passenger" == "1" ]]; then
     if [ -f "/etc/nginx/nginx.conf" ]; then
         nginx_conf_exist="1"