.circleci/config.yml in qiita_trend-0.5.2 vs .circleci/config.yml in qiita_trend-0.5.3

@@ -3,10 +3,10 @@
   ruby: circleci/ruby@1.1.2
   slack: circleci/slack@3.4.2
 executors:
   base:
     docker:
-      - image: cimg/ruby:2.6.6
+      - image: cimg/ruby:2.7.0
         auth:
           username: dodonki1223
           password: $DOCKERHUB_PASSWORD
         environment:
           # Bundlerのパス設定が書き換えられ`vendor/bundle`ではなくて`/usr/local/bundle`を参照してしまい`bundle exec`でエラーになる