Bump DeterminateSystems/magic-nix-cache-action from 2 to 3

Bumps [DeterminateSystems/magic-nix-cache-action](https://github.com/determinatesystems/magic-nix-cache-action) from 2 to 3.
- [Release notes](https://github.com/determinatesystems/magic-nix-cache-action/releases)
- [Commits](https://github.com/determinatesystems/magic-nix-cache-action/compare/v2...v3)

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

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/build-iso.yml

@@ -23,7 +23,7 @@ jobs:
     steps:
     - uses: actions/checkout@v4
     - uses: DeterminateSystems/nix-installer-action@v6
-    - uses: DeterminateSystems/magic-nix-cache-action@v2
+    - uses: DeterminateSystems/magic-nix-cache-action@v3
     - name: Build Console ISO
       run: |
         nix build .#nixosConfigurations.iso-console.config.system.build.isoImage
@@ -47,7 +47,7 @@ jobs:
     steps:
     - uses: actions/checkout@v4
     - uses: DeterminateSystems/nix-installer-action@v6
-    - uses: DeterminateSystems/magic-nix-cache-action@v2
+    - uses: DeterminateSystems/magic-nix-cache-action@v3
     - name: Build Desktop ISO
       run: |
         nix build .#nixosConfigurations.iso-desktop.config.system.build.isoImage

.github/workflows/deadnix.yml

@@ -12,5 +12,5 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - uses: DeterminateSystems/nix-installer-action@v6
-      - uses: DeterminateSystems/magic-nix-cache-action@v2
+      - uses: DeterminateSystems/magic-nix-cache-action@v3
       - uses: astro/deadnix-action@v1

.github/workflows/flake-checker.yml

@@ -18,5 +18,5 @@ jobs:
         with:
           fetch-depth: 0
       - uses: DeterminateSystems/nix-installer-action@v6
-      - uses: DeterminateSystems/magic-nix-cache-action@v2
+      - uses: DeterminateSystems/magic-nix-cache-action@v3
       - uses: DeterminateSystems/flake-checker-action@v5

.github/workflows/lock-updater.yml

@@ -15,7 +15,7 @@ jobs:
         with:
           fetch-depth: 0
       - uses: DeterminateSystems/nix-installer-action@v6
-      - uses: DeterminateSystems/magic-nix-cache-action@v2
+      - uses: DeterminateSystems/magic-nix-cache-action@v3
       - uses: DeterminateSystems/update-flake-lock@v20
         with:
           pr-title: "chore: update flake.lock"