ci: use Debian Bookworm (GCC 12) for ARM ci job

Co-authored-by: MarcoFalke <*~=`'#}+{/-|&$^_@721217.xyz>

Author: fanquake

ci/test/00_setup_env_arm.sh

@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 #
-# Copyright (c) 2019-2021 The Bitcoin Core developers
+# Copyright (c) 2019-present The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -10,7 +10,7 @@ export HOST=arm-linux-gnueabihf
 export DPKG_ADD_ARCH="armhf"
 export PACKAGES="python3-zmq g++-arm-linux-gnueabihf busybox libc6:armhf libstdc++6:armhf libfontconfig1:armhf libxcb1:armhf"
 export CONTAINER_NAME=ci_arm_linux
-export CI_IMAGE_NAME_TAG="docker.io/arm64v8/debian:bookworm"
+export CI_IMAGE_NAME_TAG="docker.io/arm64v8/debian:bookworm"  # Check that https://packages.debian.org/bookworm/g++-arm-linux-gnueabihf (version 12.2, similar to guix) can cross-compile
 export USE_BUSY_BOX=true
 export RUN_UNIT_TESTS=true
 export RUN_FUNCTIONAL_TESTS=false