ci(github): set Node.js version to 16 in build.yml workflow

Author: remarkablemark

.github/workflows/build.yml

@@ -14,6 +14,8 @@ jobs:
 
       - name: Use Node.js
         uses: actions/setup-node@v2
+        with:
+          node-version: 16
 
       - name: Cache dependencies
         uses: actions/cache@v2