Dependabot(deps): Bump cachix/install-nix-action from 27 to 29 (#834)

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] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/actions/common-setup/action.yml

@@ -11,7 +11,7 @@ runs:
   steps:
 
     - name: Installing Nix
-      uses: cachix/install-nix-action@v27
+      uses: cachix/install-nix-action@v29
       with:
         nix_path: nixpkgs=channel:nixpkgs-unstable
         extra_nix_config: |

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

@@ -11,7 +11,7 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v4
       - 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 }}