Update Github Actions

Author: patrickjuchli

.github/workflows/nodejs.yml

@@ -16,12 +16,12 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [18.x, 19.x, 20.x, 21.x, 22.x, 23.x, 24.x, 25.x]
+        node-version: [20.x, 22.x, 24.x, 25.x]
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Use Node.js ${{ matrix.node-version }}
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v6
         with:
           node-version: ${{ matrix.node-version }}
       - run: npm ci