Update build workflow to use node20

.github/workflows/build.yml

@@ -10,10 +10,10 @@ jobs:
     steps:
       - name: Get the sources
         uses: actions/checkout@v1
-      - name: Install Node 16
+      - name: Install Node 20
         uses: actions/setup-node@v2
         with:
-          node-version: '16'
+          node-version: '20'
       - name: Restore the dependencies
         run: npm install
       - name: Build