Update actions/checkout action to v4 (#28)

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

Author: renovate[bot]

.github/workflows/test.yaml

@@ -9,7 +9,7 @@ jobs:
   test-linting:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4
       - uses: actions/setup-node@60edb5dd545a775178f52524783378180af0d1f8 # v4
         with:
           node-version: "16"