chore(deps): update actions/checkout action to v5

Author: renovate[bot]

.github/workflows/tests.yml

@@ -11,7 +11,7 @@ jobs:
         node-version: [ 18, 20, 22 ]
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Use Node.js ${{ matrix.node-version }}
         uses: actions/setup-node@v4
         with: