update to 12.3.0

Author: andrenarchy

Dockerfile

@@ -1,7 +1,7 @@
 FROM debian:stretch
 
 # git tag from https://github.com/stellar/stellar-core
-ARG STELLAR_CORE_VERSION="v12.2.0"
+ARG STELLAR_CORE_VERSION="v12.3.0"
 ARG STELLAR_CORE_BUILD_DEPS="git build-essential pkg-config autoconf automake libtool bison flex libpq-dev wget pandoc"
 ARG STELLAR_CORE_DEPS="curl jq libpq5"
 ARG CONFD_VERSION="0.16.0"