Update actions/checkout action to v6 (#47)

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

Author: renovate[bot]

.github/workflows/go.yml

@@ -17,7 +17,7 @@ jobs:
         with:
           go-version: ^1.17
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: golangci-lint
         uses: golangci/golangci-lint-action@v9
         with:
@@ -33,7 +33,7 @@ jobs:
         with:
           go-version: ^1.17
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Vet
         run: go vet -v ./...
       - name: Test