chore(release): 1.0.0-alpha.10 [skip ci]

# [1.0.0-alpha.10](https://git.gitlab.arm.com/bazel/rules_toolchain/compare/v1.0.0-alpha.9...v1.0.0-alpha.10) (2023-12-13)

### Features

* make `which` mandatory ([274d2c96](https://git.gitlab.arm.com/bazel/rules_toolchain/commit/274d2c96991ea897a76055527561e5346402792a))