chore: build for x86_64_v3

containers/jug/dev.Dockerfile

@@ -40,7 +40,7 @@ RUN git clone https://github.com/${SPACK_ORGREPO}.git ${SPACK_ROOT}     \
  && ln -s $SPACK_ROOT/share/spack/docker/entrypoint.bash                \
           /usr/sbin/spack-env                                           \
  && export PATH=${PATH}:${SPACK_ROOT}/bin                               \
- && spack config --scope site add "packages:all:target:[x86_64]"        \
+ && spack config --scope site add "packages:all:target:[x86_64_v3]"     \
  && spack config blame packages                                         \
  && spack config --scope site add "config:suppress_gpg_warnings:true"   \
  && spack config --scope site add "config:build_jobs:64"                \