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

# [1.0.0-beta.6](https://git.gitlab.arm.com/bazel/rules_gzip/compare/v1.0.0-beta.5...v1.0.0-beta.6) (2024-11-26)

### Bug Fixes

* update dependencies for Bazel 8 support ([9232f20c](https://git.gitlab.arm.com/bazel/rules_gzip/commit/9232f20cb4b6f3b3af3346e6f68af7d99ba85be6))

### chore

* remove deprecated `pigz` toolchain ([7ed04d05](https://git.gitlab.arm.com/bazel/rules_gzip/commit/7ed04d056cd5d936362435bde02e2492f8f0d885))

### BREAKING CHANGES

* remove `pigz` toolchain.

Use `@rules_gzip//gzip/toolchain/gzip:type` instead.

We cannot guarantee `pigz` implementation.

`pigz` is a drop-in for `gzip` so we will register `pigz` implementations
to the `gzip` toolchain in the future.