chore(deps): bump actions/checkout from 5 to 6 (#172)

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

.github/workflows/code-quality.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Code checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Setup Alejandra CLI
         uses: 0xc000022070/setup-alejandra@v4.0.0
@@ -20,7 +20,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Code checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Install Nix
         uses: cachix/install-nix-action@v31