Update Node.js version matrix in workflow

Author: Harsh-Microsoft

.github/workflows/node.js.yml

@@ -18,7 +18,7 @@ jobs:
         working-directory: frontend
     strategy:
       matrix:
-        node-version: [16.x, 18.x, 21.x]
+        node-version: [18.x, 21.x]
         # See supported Node.js release schedule at https://nodejs.org/en/about/releases/
 
     steps: