Bump DeterminateSystems/magic-nix-cache-action from 2 to 3 (#34)

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](DeterminateSystems/magic-nix-cache-action@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] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/ci.yml

@@ -23,7 +23,7 @@ jobs:
             extra-platforms = aarch64-linux x86_64-linux
 
       - name: Cache Nix store
-        uses: DeterminateSystems/magic-nix-cache-action@v2
+        uses: DeterminateSystems/magic-nix-cache-action@v3
 
       - name: Check flake
         run: nix flake check --accept-flake-config
@@ -57,7 +57,7 @@ jobs:
             extra-platforms = aarch64-linux x86_64-linux
 
       - name: Cache Nix store
-        uses: DeterminateSystems/magic-nix-cache-action@v2
+        uses: DeterminateSystems/magic-nix-cache-action@v3
 
       - name: Build package
         run: nix build --accept-flake-config .#packages.${{ matrix.system }}.${{ matrix.package }}
@@ -110,7 +110,7 @@ jobs:
             extra-platforms = aarch64-linux x86_64-linux
 
       - name: Cache Nix store
-        uses: DeterminateSystems/magic-nix-cache-action@v2
+        uses: DeterminateSystems/magic-nix-cache-action@v3
 
       - name: Build ${{ matrix.bundler.name }} package for ${{ matrix.system }}
         run: >-
@@ -159,7 +159,7 @@ jobs:
         uses: DeterminateSystems/nix-installer-action@v9
 
       - name: Cache Nix store
-        uses: DeterminateSystems/magic-nix-cache-action@v2
+        uses: DeterminateSystems/magic-nix-cache-action@v3
 
       - name: Build package
         run: nix build --accept-flake-config .#docs