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

Author: renovate[bot]

.github/workflows/test.yaml

@@ -22,7 +22,7 @@ jobs:
             go-version: '1.14.1'
             check-latest: false
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/setup-go@v6
         with:
           go-version: "${{ matrix.go-version }}"