Update actions/checkout action to v6 (#67)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/dependency-review.yml

@@ -28,7 +28,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: 'Checkout repository'
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: 'Dependency Review'
         uses: actions/dependency-review-action@v4
         # Commonly enabled options, see https://github.com/actions/dependency-review-action#configuration-options for all available options.

.github/workflows/go.yml

@@ -21,7 +21,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           # Fetch all history for proper SonarQube analysis
           fetch-depth: 0