chore: Harden GitHub Actions (#583)

Author: step-security-bot

.github/workflows/ci.yaml

@@ -30,22 +30,22 @@ jobs:
           echo $env:PATH >> $env:GITHUB_PATH
 
       - name: Setup Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@1d0ff469b7ec7b3cb9d8673fde0c81c44821de2a # v4.2.0
         with:
           node-version: 20.18.0
 
       - name: Setup Docker
-        uses: docker/setup-buildx-action@v3 
+        uses: docker/setup-buildx-action@6524bf65af31da8d45b59e8c27de4bd072b392f5 # v3.8.0 
         if: runner.os == 'Linux'
 
       - name: Fetch
-        uses: actions/checkout@v4
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
           fetch-depth: 1
 
       # Skip macOS & Windows, cache there is slower
       - name: Restore node_modules cache for Linux
-        uses: actions/cache@v4
+        uses: actions/cache@1bd1e32a3bdc45362d1e726936510720a7c30a57 # v4.2.0
         with:
           path: ~/.npm
           key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}