chore(deps): update cachix/install-nix-action digest to 51f3067

Author: renovate[bot]

.github/workflows/update-deps.yml

@@ -19,7 +19,7 @@ jobs:
         uses: actions/setup-go@7a3fe6cf4cb3a834922a1244abfce67bcef6a0c5 # v6
 
       - name: Install Nix
-        uses: cachix/install-nix-action@4e002c8ec80594ecd40e759629461e26c8abed15 # v31
+        uses: cachix/install-nix-action@51f3067b56fe8ae331890c77d4e454f6d60615ff # v31
         with:
           nix_path: nixpkgs=channel:nixos-unstable