message: Fix typo in spack URL
diff: "package_version": "develop",
  "package_final_phase": "initconfig",
  "package_source_dir": "../..",
  -"spack_url": "https://github.com:spack/spack",
  +"spack_url": "https://github.com/spack/spack",
  "spack_commit": "b596abe037b3e8b290335927dbae3db54042e0b6",
  "spack_configs_path": "scripts/spack/configs",
  "spack_packages_path": "scripts/spack/packages",
  