chore(deps): update actions/checkout action to v4 (#175)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/test.yml

@@ -10,7 +10,7 @@ jobs:
         os: [ubuntu-latest, macOS-latest, windows-latest]
         node-version: [12.x, 14.x, 16.x]
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Use Node.js ${{ matrix.node-version }}
         uses: actions/setup-node@v2
         with: