Update actions/checkout action to v6

Author: renovate[bot]

.github/workflows/actions.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
       - name: Checkout
-        uses: actions/checkout@v5.0.0
+        uses: actions/checkout@v6.0.0
 
       - name: Golangci-lint
         uses: golangci/[email protected]
@@ -24,7 +24,7 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
       - name: Checkout
-        uses: actions/checkout@v5.0.0
+        uses: actions/checkout@v6.0.0
         with:
           fetch-depth: 0