actions: bump cachix/install-nix-action from 20 to 23 (#51)

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](https://github.com/cachix/install-nix-action/compare/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>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/format.yml

@@ -11,7 +11,7 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
-      - uses: cachix/install-nix-action@v20
+      - uses: cachix/install-nix-action@v23
         with:
           github_access_token: ${{ secrets.GITHUB_TOKEN }}
       - name: Run formatter

.github/workflows/test-vm.yml

@@ -19,7 +19,7 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
-      - uses: cachix/install-nix-action@v20
+      - uses: cachix/install-nix-action@v23
         with:
           extra_nix_config: "system-features = benchmark big-parallel kvm nixos-test uid-range"
       - uses: DeterminateSystems/magic-nix-cache-action@main

.github/workflows/update-docs.yml

@@ -24,7 +24,7 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
-      - uses: cachix/install-nix-action@v22
+      - uses: cachix/install-nix-action@v23
 
       - name: Get short revision
         id: rev

.github/workflows/update-lock.yml

@@ -12,7 +12,7 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
-      - uses: cachix/install-nix-action@v22
+      - uses: cachix/install-nix-action@v23
 
       - name: Set Git user info
         run: |