Update GitHub Actions workflows

- update actions/setup-node to fix extra 10 minute delay in CI
- update Node.js
- use version ranges instead of commit hashes to get future updates
  automatically (we already trust the GitHub Actions team)

.github/workflows/node.js.yml

@@ -9,13 +9,13 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
+    - uses: actions/checkout@v4
       with:
         persist-credentials: false
     - name: Install Node.js
-      uses: actions/setup-node@39370e3970a6d050c480ffad4ff0ed4d3fdee5af
+      uses: actions/setup-node@v4
       with:
-        node-version: 20
+        node-version: 22
         cache: npm
     - run: npm ci
     - run: npm run build