chore(deps): 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

@@ -31,7 +31,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - uses: cachix/install-nix-action@v23
+      - uses: cachix/install-nix-action@v24
         with:
           # NIX_PATH is explicitly set to a wrong value to prevent accidental
           # usage. `nixpkgs` should be accessed only through the locked flake

.github/workflows/update-flake-lock.yml

@@ -15,7 +15,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - uses: cachix/install-nix-action@v23
+      - uses: cachix/install-nix-action@v24
         with:
           nix_path: nixpkgs=channel:nixos-unstable
           github_access_token: ${{ secrets.GITHUB_TOKEN }}