Update actions/checkout action to v5

Author: renovate[bot]

.github/workflows/test.yml

@@ -30,7 +30,7 @@ jobs:
           go-version: ${{ matrix.go-version }}
 
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Cache Go modules
         uses: actions/cache@v4