chore(ci): Bump the gh-actions-deps group with 2 updates

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


Updates `cachix/install-nix-action` from 26 to 31
- [Release notes](https://github.com/cachix/install-nix-action/releases)
- [Commits](cachix/install-nix-action@v26...v31)

Updates `cachix/cachix-action` from 14 to 16
- [Release notes](https://github.com/cachix/cachix-action/releases)
- [Commits](cachix/cachix-action@v14...v16)

---
updated-dependencies:
- dependency-name: cachix/install-nix-action
  dependency-version: '31'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: gh-actions-deps
- dependency-name: cachix/cachix-action
  dependency-version: '16'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: gh-actions-deps
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/test.yml

@@ -13,8 +13,8 @@ jobs:
 
     steps:
     - uses: actions/checkout@v4
-    - uses: cachix/install-nix-action@v26
-    - uses: cachix/cachix-action@v14
+    - uses: cachix/install-nix-action@v31
+    - uses: cachix/cachix-action@v16
       with:
         name: devenv
     - name: Install devenv.sh