Update cachix/install-nix-action action to v31.10.4

Author: renovate[bot]

.github/workflows/test.yml

@@ -35,7 +35,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
-      - uses: cachix/install-nix-action@19effe9fe722874e6d46dd7182e4b8b7a43c4a99 # v31.10.0
+      - uses: cachix/install-nix-action@616559265b40713947b9c190a8ff4b507b5df49b # v31.10.4
         with:
           nix_path: nixpkgs=channel:nixos-25.11
       - uses: DeterminateSystems/magic-nix-cache-action@565684385bcd71bad329742eefe8d12f2e765b39 # v13