ci: bump nix

Author: sandydoo

.github/workflows/deploy.yml

@@ -12,7 +12,7 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Install Nix
-        uses: cachix/install-nix-action@v23
+        uses: cachix/install-nix-action@v30
 
       - name: Build app
         run: nix build .#web