bump vpn version for ipv6 socket fix

Author: zestrada

Dockerfile

@@ -7,7 +7,7 @@ ARG LINUX_VERSION="2.4.21"
 ARG LIBNVRAM_VERSION="0.0.16"
 ARG CONSOLE_VERSION="1.0.5"
 ARG PENGUIN_PLUGINS_VERSION="1.5.15"
-ARG VPN_VERSION="1.0.19"
+ARG VPN_VERSION="1.0.20"
 ARG HYPERFS_VERSION="0.0.38"
 ARG GUESTHOPPER_VERSION="1.0.15"
 ARG GLOW_VERSION="1.5.1"