Replace CircleCI Scheduled workflows (2022/06/03)

[zoetrope]

What

Scheduled workflows will be deprecated June 3, 2022. https://circleci.com/docs/ja/2.0/workflows/#scheduling-a-workflow

How

We can use scheduled pipelines.

• https://github.com/cybozu-go/neco-apps/blob/7a43554da869c2aa06c562541402fb16a360aa33/.circleci/config.yml#L414
• https://github.com/cybozu-go/neco/blob/dcb4f92f9609c098020211c1e507219b9a17d1cb/.circleci/config.yml#L449

Checklist

• [ ] Finish implementation of the issue
• [ ] Test all functions
• [ ] Have enough logs to trace activities
• [ ] Notify developers of necessary actions