Update pr-check to use Node 16 (Azure#268)

Author: Youssef1313

.github/workflows/azure-login-pr-check.yml

@@ -16,11 +16,11 @@ jobs:
           repository: ${{ github.event.pull_request.head.repo.full_name }}
           ref: ${{ github.event.pull_request.head.ref }}
 
-         # Using 12.x version as an example
-       - name: Set Node.js 12.x for GitHub Action
+         # Using 16.x version as an example
+       - name: Set Node.js 16.x for GitHub Action
          uses: actions/setup-node@v1
          with:
-           node-version: 12.x
+           node-version: 16.x
 
        - name: installing node_modules
          run: npm install 
@@ -68,5 +68,3 @@ jobs:
          with:
            inlineScript: "Get-AzContext"
            azPSVersion: "latest"
-          
-