Use bin/rails

Author: xuanxu

.github/workflows/tests.yml

@@ -36,6 +36,6 @@ jobs:
           RAILS_ENV: test
           GH_SECRET: 12345
         run: |
-          bundle exec rails db:create
-          bundle exec rails db:schema:load
-          bundle exec rails spec
+          bin/rails db:create
+          bin/rails db:schema:load
+          bin/rails spec