chore(deps): bump cachix/install-nix-action from 31.10.1 to 31.10.3 (#21522)

Bumps [cachix/install-nix-action](https://github.com/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](1ca7d21a94...96951a368b)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/update-nix-hash.yml

@@ -20,7 +20,7 @@ jobs:
             - name: Checkout
               uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
             - name: Install Nix
-              uses: cachix/install-nix-action@1ca7d21a94afc7c957383a2d217460d980de4934 # v31.10.1
+              uses: cachix/install-nix-action@96951a368ba55167b55f1c916f7d416bac6505fe # v31.10.3
               with:
                   nix_path: nixpkgs=channel:nixos-unstable