Fix code style

Author: acrobat

.github/workflows/ci.yaml

@@ -9,8 +9,8 @@ jobs:
         runs-on: ubuntu-latest
 
         steps:
-            - uses: actions/checkout@v2
-            - uses: actions/setup-node@v1
+            -   uses: actions/checkout@v2
+            -   uses: actions/setup-node@v1
 
             -   name: Install grunt
                 run: yarn global add grunt-cli