fixed yaml syntax

.github/workflows/ci.yml

@@ -17,11 +17,11 @@ jobs:
 
     - name: 'Checking out repo code'
       uses: actions/checkout@v2
-      
+
     - name: Set Node.js 16.x for GitHub Action
-         uses: actions/setup-node@v1
-         with:
-           node-version: 16.x
+      uses: actions/setup-node@v1
+      with:
+        node-version: 16.x
 
     - name: 'Validate build'
       run: |