chore(deps): bump DeterminateSystems/nix-installer-action from 3 to 4

Bumps [DeterminateSystems/nix-installer-action](https://github.com/determinatesystems/nix-installer-action) from 3 to 4.
- [Release notes](https://github.com/determinatesystems/nix-installer-action/releases)
- [Commits](https://github.com/determinatesystems/nix-installer-action/compare/v3...v4)

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

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

.github/workflows/flake.yml

@@ -12,6 +12,6 @@ jobs:
       - name: Check Nix flake inputs
         uses: DeterminateSystems/flake-checker-action@v5 # This action
       - name: Install Nix
-        uses: DeterminateSystems/nix-installer-action@v3
+        uses: DeterminateSystems/nix-installer-action@v4
       - name: Build default package
         run: nix build