Build(deps): Bump cachix/install-nix-action from 22 to 23

Bumps [cachix/install-nix-action](https://github.com/cachix/install-nix-action) from 22 to 23.
- [Release notes](https://github.com/cachix/install-nix-action/releases)
- [Commits](cachix/install-nix-action@v22...v23)

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

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

.github/workflows/flake-update.yml

@@ -14,7 +14,7 @@ jobs:
       - name: Checkout repository
         uses: actions/[email protected]
       - name: Install Nix
-        uses: cachix/install-nix-action@v22
+        uses: cachix/install-nix-action@v23
         with:
           extra_nix_config: |
             access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}