build(deps): bump cachix/install-nix-action from 24 to 25

Bumps [cachix/install-nix-action](https://github.com/cachix/install-nix-action) from 24 to 25.
- [Release notes](https://github.com/cachix/install-nix-action/releases)
- [Commits](cachix/install-nix-action@v24...v25)

---
updated-dependencies:
- dependency-name: cachix/install-nix-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/build.yml

@@ -12,7 +12,7 @@ jobs:
     - name: Checkout
       uses: actions/checkout@v4
     - name: Install Nix
-      uses: cachix/install-nix-action@v24
+      uses: cachix/install-nix-action@v25
       with:
         github_access_token: ${{ secrets.GITHUB_TOKEN }}
         nix_path: nixpkgs=https://github.com/NixOS/nixpkgs/tarball/master