chore(release): 1.0.0-alpha.4 [skip ci]

# [1.0.0-alpha.4](https://git.gitlab.arm.com/bazel/rules_toolchain/compare/v1.0.0-alpha.3...v1.0.0-alpha.4) (2023-11-16)

### Bug Fixes

* **release:** add `metadata.json` to the release ([d8557b55](https://git.gitlab.arm.com/bazel/rules_toolchain/commit/d8557b55d92bdba0adb4724278842868daa09430))