fix CI config

.github/workflows/ci.yml

@@ -14,16 +14,16 @@ jobs:
     matrix:
       node-version: [14.x, 16.x, 18.x, 20.x]
   steps:
-    - name: Clean global cache
+  -   name: Clean global cache
       run: npm cache clean --force
-    - name: Set up Node
-      uses: actions/checkout@v3
+  -   name: Set up Node
+      uses: actions/checkout@main
       with:
         node-version: ${{ matrix.node-version }}
         cache: 'npm'
-    - name: Install dependencies
+  -   name: Install dependencies
       run: npm install
-    - name: CI build & test
+  -   name: CI build & test
       run: |
         npm run build --if-present
         npm test