chore(deps): bump cachix/install-nix-action from 27 to 29

Bumps [cachix/install-nix-action](https://github.com/cachix/install-nix-action) from 27 to 29.
- [Release notes](https://github.com/cachix/install-nix-action/releases)
- [Commits](cachix/install-nix-action@v27...v29)

---
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/build-aarch64-damogran-sdimage.yaml

@@ -5,7 +5,7 @@ jobs:
     - name: Checkout repository
       uses: actions/checkout@v4.1.7
     - name: Install Nix
-      uses: cachix/install-nix-action@v27
+      uses: cachix/install-nix-action@v29
       with:
         extra_nix_config: access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
         nix_path: nixpkgs=channel:nixos-24.05

.github/workflows/build-aarch64-linux-devshell.yaml

@@ -5,7 +5,7 @@ jobs:
     - name: Checkout repository
       uses: actions/checkout@v4.1.7
     - name: Install Nix
-      uses: cachix/install-nix-action@v27
+      uses: cachix/install-nix-action@v29
       with:
         extra_nix_config: access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
         nix_path: nixpkgs=channel:nixos-24.05

.github/workflows/build-x86_64-devshell.yaml

@@ -5,7 +5,7 @@ jobs:
     - name: Checkout repository
       uses: actions/checkout@v4.1.7
     - name: Install Nix
-      uses: cachix/install-nix-action@v27
+      uses: cachix/install-nix-action@v29
       with:
         extra_nix_config: access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
         nix_path: nixpkgs=channel:nixos-24.05

.github/workflows/build-x86_64-host.yaml

@@ -5,7 +5,7 @@ jobs:
     - name: Checkout repository
       uses: actions/checkout@v4.1.7
     - name: Install Nix
-      uses: cachix/install-nix-action@v27
+      uses: cachix/install-nix-action@v29
       with:
         extra_nix_config: access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
         nix_path: nixpkgs=channel:nixos-24.05

.github/workflows/keygen_iso_release.yaml

@@ -5,7 +5,7 @@ jobs:
     - name: Checkout repository
       uses: actions/checkout@v4.1.7
     - name: Install Nix
-      uses: cachix/install-nix-action@v27
+      uses: cachix/install-nix-action@v29
       with:
         extra_nix_config: access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
         nix_path: nixpkgs=channel:nixos-24.05

.github/workflows/update-flake.yaml

@@ -5,7 +5,7 @@ jobs:
     - name: Checkout repository
       uses: actions/checkout@v4.1.7
     - name: Install Nix
-      uses: cachix/install-nix-action@v27
+      uses: cachix/install-nix-action@v29
       with:
         extra_nix_config: access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
         nix_path: nixpkgs=channel:nixos-24.05