chore(release): 1.0.0-alpha.6 [skip ci]

# [1.0.0-alpha.6](https://git.gitlab.arm.com/bazel/rules_toolchain/compare/v1.0.0-alpha.5...v1.0.0-alpha.6) (2023-11-30)

### Bug Fixes

* add missing stub file ([fdcc9c01](https://git.gitlab.arm.com/bazel/rules_toolchain/commit/fdcc9c013c99bf6c0fb8c29270f4412f83400a83))
* upload release files to generic package registry ([d5deccfa](https://git.gitlab.arm.com/bazel/rules_toolchain/commit/d5deccfa9dc35482c23b7376fb368f8037d51845))

### Features

* add `export` extension ([35bae073](https://git.gitlab.arm.com/bazel/rules_toolchain/commit/35bae07323b7ac4a9ddeab60909d9c411970fab2))
* **rules_toolchain:** add `:entrypoint` target to local repositories ([a995bd47](https://git.gitlab.arm.com/bazel/rules_toolchain/commit/a995bd4702de985b14cd99ce1f896f1833342b29))