Describes the cause and action for error messages.
Error Message(English)：
cancel pr approval
Dismissing a pull request review - GitHub Help
https://help.github.com/en/articles/dismissing-a-pull-request-review
Approving a pull request with required reviews - GitHub Help
https://help.github.com/en/articles/approving-a-pull-request-with-required-reviews
How to un-approve github review after new commits automatically ...
https://stackoverflow.com/questions/41824374/how-to-un-approve-github-review-after-new-commits-autom・・・
Github API Approved Pull Request
https://stackoverflow.com/questions/40404785/github-api-approved-pull-request
Is there a way to make Github un-approve a pull request if a ...
https://stackoverflow.com/questions/40505904/is-there-a-way-to-make-github-un-approve-a-pull-request・・・
How To Approve Commits On Github
https://stackoverflow.com/questions/7413613/how-to-approve-commits-on-github
How to cancel a pull request on github?
https://stackoverflow.com/questions/5385567/how-to-cancel-a-pull-request-on-github
Dismissing reviews on Pull Requests - The GitHub Blog
https://github.blog/2016-10-12-dismissing-reviews-on-pull-requests/
Github ? Approve / Request Changes / Comment の使い方 - Qiita
https://qiita.com/YumaInaura/items/8223add6d8335a2eda7f