chore(deps): update cachix/install-nix-action digest to 6165592 (#273)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/nix.yml

@@ -18,7 +18,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       # Install Nix on the runner
-      - uses: cachix/install-nix-action@96951a368ba55167b55f1c916f7d416bac6505fe  # v31
+      - uses: cachix/install-nix-action@616559265b40713947b9c190a8ff4b507b5df49b  # v31
         with:
           nix_path: nixpkgs=channel:nixos-unstable
       # Pull from our cachix cache (currently unused)