ci: fix config format

Author: haoqunjiang

.circleci/config.yml

@@ -53,15 +53,15 @@ jobs:
       - run: yarn lint-without-fix
       - run: yarn check-links
       - restore_cache:
-        keys:
-          # TODO: should use a more accurate cache key
-          - v2-vue-cli-offline-{{ .Branch }}-{{ checksum "yarn.lock" }}
+          keys:
+            # TODO: should use a more accurate cache key
+            - v2-vue-cli-offline-{{ .Branch }}-{{ checksum "yarn.lock" }}
       - run: yarn config set yarn-offline-mirror ~/npm-packages-offline-cache
       - run: yarn test -p cli-service-global,eslint,pwa,babel,babel-preset-app,vuex,router
       - save_cache:
-        key: v2-vue-cli-offline-{{ .Branch }}-{{ checksum "yarn.lock" }}
-        paths:
-          - ~/npm-packages-offline-cache
+          key: v2-vue-cli-offline-{{ .Branch }}-{{ checksum "yarn.lock" }}
+          paths:
+            - ~/npm-packages-offline-cache
 
   group-4:
     <<: *defaults