Github do not merge label

Describes the cause and action for error messages.

Error Message(English)：
do not merge label

Resolution

need way to remove `do-not-merge` label. ・ Issue #2196 ... - GitHub
https://github.com/kubernetes/test-infra/issues/2196

Automatically add "DO-NOT-MERGE" label on wip PRs - GitHub
https://github.com/python/bedevere/issues/130

Let's add do-not-merge label condition for Mergify.io ・ Issue ... - GitHub
https://github.com/Activiti/Activiti/issues/2215

dont-merge/README.md at master ・ Muhnad/dont-merge ・ GitHub
https://github.com/Muhnad/dont-merge/blob/master/README.md

README.md - GitHub
https://github.com/eslint/eslint-github-bot/blob/master/README.md

GitHub - syndesisio/pure-bot: Pull Request Bot to automate ...
https://github.com/syndesisio/pure-bot

Better Pull Request Management with Custom Labels ・ InVision ...
https://engineering.invisionapp.com/post/pr-labels/

GitHub draft pull request feature - Core Workflow - Discussions on ...
https://discuss.python.org/t/github-draft-pull-request-feature/896

大規模な変更や長期にわたる変更の GitHub 共同作成ワークフロー ...
https://docs.microsoft.com/ja-jp/contribute/how-to-write-workflows-major