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

Author: renovate[bot]

.github/actions/build-nix-image/action.yml

@@ -57,7 +57,7 @@ runs:
     #   uses: DeterminateSystems/magic-nix-cache-action@b46e247b898aa56e6d2d2e728dc6df6c84fdb738 # ratchet:DeterminateSystems/magic-nix-cache-action@v7
 
     - name: Setup Remote Nix Cache
-      uses: cachix/cachix-action@ad2ddac53f961de1989924296a1f236fcfbaa4fc # ratchet:cachix/cachix-action@v15
+      uses: cachix/cachix-action@0fc020193b5a1fa3ac4575aa3a7d3aa6a35435ad # v16
       with:
         name: "${{ inputs.cachixCacheName }}"
         authToken: "${{ inputs.cachixAuthToken }}"

.github/workflows/cid.yaml

@@ -128,7 +128,7 @@ jobs:
           extra-conf: 'system-features = nixos-test benchmark big-parallel kvm'
       # - name: Run the Magic Nix Cache
       #   uses: DeterminateSystems/magic-nix-cache-action@main
-      - uses: cachix/cachix-action@ad2ddac53f961de1989924296a1f236fcfbaa4fc # ratchet:cachix/cachix-action@v15
+      - uses: cachix/cachix-action@0fc020193b5a1fa3ac4575aa3a7d3aa6a35435ad # v16
         with:
           name: "${{ vars.CACHIX_CACHE_NAME }}"
           authToken: "${{ secrets.CACHIX_AUTH_TOKEN }}"