message: bump spack to include scr fix
diff: "package_final_phase": "initconfig",
  "package_source_dir": "../..",
  "spack_url": "https://github.com/spack/spack.git",
  -"spack_commit": "6e5dc7374cefc2fbade06582fb56b45126c97b9b",
  +"spack_commit": "937b576b5b8157c6bd639af4895f702a06e64499",
  "spack_configs_path": "scripts/spack/configs",
  "spack_packages_path": "scripts/spack/packages",
  "spack_concretizer": "clingo",
  