build(deps): bump the github-actions group with 2 updates

Bumps the github-actions group with 2 updates: [actions/checkout](https://github.com/actions/checkout) and [cachix/cachix-action](https://github.com/cachix/cachix-action).


Updates `actions/checkout` from 6.0.1 to 6.0.2
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@8e8c483...de0fac2)

Updates `cachix/cachix-action` from 0fc020193b5a1fa3ac4575aa3a7d3aa6a35435ad to 3ba601ff5bbb07c7220846facfa2cd81eeee15a1
- [Release notes](https://github.com/cachix/cachix-action/releases)
- [Commits](cachix/cachix-action@0fc0201...3ba601f)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: 6.0.2
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: github-actions
- dependency-name: cachix/cachix-action
  dependency-version: 3ba601ff5bbb07c7220846facfa2cd81eeee15a1
  dependency-type: direct:production
  dependency-group: github-actions
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/test.yml

@@ -89,12 +89,12 @@ jobs:
         - {os: ubuntu-24.04-arm, pianotrans: pianotrans-rocm}
     runs-on: ${{ matrix.os }}
     steps:
-    - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+    - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
     - uses: azuwis/actions/nix@main
       with:
         key: nix-${{ matrix.pianotrans }}
         debug: ${{ inputs.debug }}
-    - uses: cachix/cachix-action@0fc020193b5a1fa3ac4575aa3a7d3aa6a35435ad # v16
+    - uses: cachix/cachix-action@3ba601ff5bbb07c7220846facfa2cd81eeee15a1 # v16
       with:
         name: azuwis
         authToken: ${{ secrets.CACHIX_AUTH_TOKEN }}