chore(deps): bump cachix/install-nix-action from 31.7.0 to 31.8.0 (#165)

Author: dependabot[bot]

.github/workflows/ci-nix.yml

@@ -19,7 +19,7 @@ jobs:
         uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
 
       - name: Install Nix
-        uses: cachix/install-nix-action@9280e7aca88deada44c930f1e2c78e21c3ae3edd # v31.7.0
+        uses: cachix/install-nix-action@7ab6e7fd29da88e74b1e314a4ae9ac6b5cda3801 # v31.8.0
 
       - name: Setup Nix GHA Cache
         uses: DeterminateSystems/magic-nix-cache-action@565684385bcd71bad329742eefe8d12f2e765b39 # v13