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

Author: renovate[bot]

.github/workflows/continuous-delivery.yml

@@ -19,7 +19,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout Project
-        uses: actions/checkout@v2
+        uses: actions/checkout@v6
       - name: Setup Docker Buildx
         uses: docker/setup-buildx-action@v1.7.0
       - name: Login to GitHub Container Registry

.github/workflows/labelsync.yml

@@ -12,7 +12,7 @@ jobs:
     if: github.repository_owner == 'wolfstar-project'
     steps:
       - name: Checkout Project
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           sparse-checkout: .github/labels.yml
           sparse-checkout-cone-mode: false