chore(deps): update actions/checkout digest to b4ffde6

Author: renovate[bot]

.github/workflows/test.yml

@@ -9,7 +9,7 @@ jobs:
         node-version: [ 14, 16 ]
     steps:
       - name: checkout
-        uses: actions/checkout@8ade135a41bc03ea155e62e844d188df1ea18608 # v4
+        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4
       - name: setup Node.js ${{ matrix.node-version }}
         uses: actions/setup-node@v3
         with: