ci: Properly bump to focal for win cross build

ci/test/00_setup_env_win64.sh

@@ -9,7 +9,8 @@ export LC_ALL=C.UTF-8
 export CONTAINER_NAME=ci_win64
 export DOCKER_NAME_TAG=ubuntu:20.04  # Check that Focal can cross-compile to win64 (Focal is used in the gitian build as well)
 export HOST=x86_64-w64-mingw32
-export PACKAGES="python3 nsis g++-mingw-w64-x86-64 wine-binfmt wine64 file"
+export DPKG_ADD_ARCH="i386"
+export PACKAGES="python3 nsis g++-mingw-w64-x86-64 wine-binfmt wine64 wine32 file"
 export RUN_FUNCTIONAL_TESTS=false
 export GOAL="deploy"
 export BITCOIN_CONFIG="--enable-reduce-exports --disable-fuzz-binary --disable-gui-tests --without-boost-process"