Bump cachix/install-nix-action from 20 to 23

Bumps [cachix/install-nix-action](https://github.com/cachix/install-nix-action) from 20 to 23.
- [Release notes](https://github.com/cachix/install-nix-action/releases)
- [Commits](cachix/install-nix-action@v20...v23)

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

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

Author: dependabot[bot]

.github/workflows/autoupdate.yml

@@ -16,7 +16,7 @@ jobs:
         repository: "CodeDownIO/registry2nix"
         ref: "81a79057d16107861161fe05cb7e04808c685e2a"
 
-    - uses: cachix/install-nix-action@v20
+    - uses: cachix/install-nix-action@v23
       with:
         nix_path: nixpkgs=channel:release-22.11
         github_access_token: ${{ secrets.GITHUB_TOKEN }}