chore: bump nix version

Author: DieracDelta

.github/workflows/nix.yml

@@ -15,7 +15,7 @@ jobs:
         fetch-depth: 0 # Nix Flakes doesn't work on shallow clones
     - uses: cachix/install-nix-action@v31
       with:
-        install_url: https://releases.nixos.org/nix/nix-2.13.3/install
+        install_url: https://releases.nixos.org/nix/nix-2.28.3/install
         extra_nix_config: |
           experimental-features = nix-command flakes pipe-operators
     - uses: cachix/cachix-action@v16