build(deps): bump DeterminateSystems/nix-installer-action from 15 to 16

Bumps [DeterminateSystems/nix-installer-action](https://github.com/determinatesystems/nix-installer-action) from 15 to 16.
- [Release notes](https://github.com/determinatesystems/nix-installer-action/releases)
- [Commits](DeterminateSystems/nix-installer-action@v15...v16)

---
updated-dependencies:
- dependency-name: DeterminateSystems/nix-installer-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/build.yml

@@ -34,15 +34,15 @@ jobs:
       uses: actions/checkout@v4
     - name: Install Nix
       if: ${{ matrix.cachixName == 'pkgs' }}
-      uses: DeterminateSystems/nix-installer-action@v15
+      uses: DeterminateSystems/nix-installer-action@v16
       with:
         github-token: ${{ secrets.GITHUB_TOKEN }}
         extra-conf: |
           extra-substituters = https://pkgs.cachix.org
           extra-trusted-public-keys = pkgs.cachix.org-1:/fnDPhnDwMjJA8IXJl+eAJmnU3n/jgfgvb6SZGuq4gs=
     - name: Install Nix (with unfree substituters)
       if: ${{ matrix.cachixName == 'some-unfree' }}
-      uses: DeterminateSystems/nix-installer-action@v15
+      uses: DeterminateSystems/nix-installer-action@v16
       with:
         github-token: ${{ secrets.GITHUB_TOKEN }}
         extra-conf: |

.github/workflows/nix-flake-update.yml

@@ -11,7 +11,7 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v4
       - name: Install Nix
-        uses: DeterminateSystems/nix-installer-action@v15
+        uses: DeterminateSystems/nix-installer-action@v16
         with:
           github-token: ${{ secrets.GH_PAT }}
       - name: Update flake.lock

.github/workflows/update.yml

@@ -13,7 +13,7 @@ jobs:
       with:
         token: ${{ secrets.GH_PAT }}
     - name: Install Nix
-      uses: DeterminateSystems/nix-installer-action@v15
+      uses: DeterminateSystems/nix-installer-action@v16
       with:
         github-token: ${{ secrets.GH_PAT }}
     - uses: DeterminateSystems/magic-nix-cache-action@v8