Bump DeterminateSystems/nix-installer-action from 3 to 4 (#64)

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

.github/workflows/flake_update.yml

@@ -18,7 +18,7 @@ jobs:
         with:
           submodules: true
       - name: Install Nix
-        uses: DeterminateSystems/nix-installer-action@v3
+        uses: DeterminateSystems/nix-installer-action@v4
       - name: Update flake.lock
         uses: DeterminateSystems/update-flake-lock@v19
         with: