use node 16 for browser-usage job

.github/workflows/usage.yml

@@ -113,7 +113,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v1
         with:
-          node-version: 12.x
+          node-version: 16.x
       - name: Get build-output from build step
         uses: actions/download-artifact@v2
         with: