Update openwrt.sh

fix stableversion variable

vm/openwrt.sh

@@ -431,8 +431,9 @@ msg_ok "Using ${CL}${BL}$STORAGE${CL} ${GN}for Storage Location."
 msg_ok "Virtual Machine ID is ${CL}${BL}$VMID${CL}."
 msg_info "Getting URL for OpenWrt Disk Image"
 
-# regex='<strong>Current Stable Release - OpenWrt ([^/]*)<\/strong>' && response=$(curl -s https://openwrt.org) && [[ $response =~ $regex ]] && stableVersion="${BASH_REMATCH[1]}"
-URL=https://downloads.openwrt.org/releases/23.05.0/targets/x86/64/openwrt-23.05.0-x86-64-generic-ext4-combined.img.gz
+response=$(curl -s https://openwrt.org)
+stableversion=$(echo "$response" | sed -n 's/.*Current stable release - OpenWrt \([0-9.]\+\).*/\1/p')
+URL="https://downloads.openwrt.org/releases/$stableversion/targets/x86/64/openwrt-$stableversion-x86-64-generic-ext4-combined.img.gz"
 
 sleep 2
 msg_ok "${CL}${BL}${URL}${CL}"