chore(deps): update actions/checkout action to v6

Author: renovate[bot]

.github/workflows/ci.yml

@@ -20,7 +20,7 @@ jobs:
       name: code_quality
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5.0.0
+        uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
       - name: Install Nix
         uses: DeterminateSystems/determinate-nix-action@1d699fc25db3f9e079cd2f168ca007a4183389be # v3.15.1
         with:
@@ -38,7 +38,7 @@ jobs:
       name: code_quality
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5.0.0
+        uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
         with:
           token: ${{ secrets.GH_TOKEN }}
       - name: Install Nix
@@ -65,7 +65,7 @@ jobs:
       name: build
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5.0.0
+        uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
       - name: Install Nix
         uses: DeterminateSystems/determinate-nix-action@1d699fc25db3f9e079cd2f168ca007a4183389be # v3.15.1
         with: