chore(deps): update cachix/cachix-action action to v16

Author: renovate[bot]

.github/workflows/ci.yml

@@ -25,7 +25,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - uses: cachix/install-nix-action@v31
-      - uses: cachix/cachix-action@v15
+      - uses: cachix/cachix-action@v16
         with:
           name: nixos-infra-dev
           authToken: "${{ secrets.CACHIX_AUTH_TOKEN }}"
@@ -46,7 +46,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - uses: cachix/install-nix-action@v31
-      - uses: cachix/cachix-action@v15
+      - uses: cachix/cachix-action@v16
         with:
           name: nixos-infra-dev
           authToken: "${{ secrets.CACHIX_AUTH_TOKEN }}"
@@ -62,7 +62,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - uses: cachix/install-nix-action@v31
-      - uses: cachix/cachix-action@v15
+      - uses: cachix/cachix-action@v16
         with:
           name: nixos-infra-dev
           authToken: "${{ secrets.CACHIX_AUTH_TOKEN }}"
@@ -78,7 +78,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - uses: cachix/install-nix-action@v31
-      - uses: cachix/cachix-action@v15
+      - uses: cachix/cachix-action@v16
         with:
           name: nixos-infra-dev
           authToken: "${{ secrets.CACHIX_AUTH_TOKEN }}"