Bump cachix/install-nix-action

Bumps the github-actions-deps group with 1 update in the / directory: [cachix/install-nix-action](https://github.com/cachix/install-nix-action).


Updates `cachix/install-nix-action` from 31.10.1 to 31.10.3
- [Release notes](https://github.com/cachix/install-nix-action/releases)
- [Changelog](https://github.com/cachix/install-nix-action/blob/master/RELEASE.md)
- [Commits](cachix/install-nix-action@v31.10.1...v31.10.3)

---
updated-dependencies:
- dependency-name: cachix/install-nix-action
  dependency-version: 31.10.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: github-actions-deps
...

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

Author: dependabot[bot]

.github/workflows/rust.yml

@@ -120,7 +120,7 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v6
       - name: Install Nix
-        uses: cachix/install-nix-action@v31.10.1
+        uses: cachix/install-nix-action@v31.10.3
         with:
           nix_path: nixpkgs=channel:nixos-unstable
       - name: Build