Update Node version to 16.x

.github/workflows/node-workflow.yml

@@ -40,10 +40,10 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v2
 
-      - name: Setup Node.js 15.x
+      - name: Setup Node.js 16.x
         uses: actions/setup-node@v1
         with:
-          node-version: 15.x
+          node-version: 16.x
 
       - name: Install dependencies
         run: npm install