Bump cachix/install-nix-action from 23 to 24

Bumps [cachix/install-nix-action](https://github.com/cachix/install-nix-action) from 23 to 24.
- [Release notes](https://github.com/cachix/install-nix-action/releases)
- [Commits](cachix/install-nix-action@v23...v24)

---
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>

.github/workflows/ci.yml

@@ -21,7 +21,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: cachix/install-nix-action@v23
+      - uses: cachix/install-nix-action@v24
         with:
           nix_path: nixpkgs=channel:nixos-unstable
       - run: nix-shell -p nixpkgs-fmt --run 'nixpkgs-fmt --check .'
@@ -119,7 +119,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: cachix/install-nix-action@v23
+      - uses: cachix/install-nix-action@v24
         with:
           nix_path: nixpkgs=channel:nixos-unstable
       - uses: cachix/cachix-action@v12

.github/workflows/main.yml

@@ -19,7 +19,7 @@ jobs:
       contents: write #  to push to repo
     steps:
       - uses: actions/checkout@v4
-      - uses: cachix/install-nix-action@v23
+      - uses: cachix/install-nix-action@v24
         with:
           nix_path: nixpkgs=channel:nixos-unstable
       - uses: cachix/cachix-action@v12