Update actions/checkout action to v5

Author: renovate[bot]

.github/workflows/test.yml

@@ -14,7 +14,7 @@ jobs:
       - uses: actions/setup-go@v1
         with:
           go-version: ${{ matrix.go-version }}
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v5
       - name: Cache go modules
         uses: actions/cache@v1
         with: