CI: pin GitHub Action version

Author: azu

.github/workflows/test.yml

@@ -11,9 +11,9 @@ jobs:
         node-version: [20,22]
     steps:
       - name: checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       - name: setup Node.js ${{ matrix.node-version }}
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         with:
           cache: "npm"
           node-version: ${{ matrix.node-version }}