Update DavidAnson/markdownlint-cli2-action action to v21 - autoclosed#72

renovate-bot wants to merge 1 commit intokoppor:mainkoppor/github-contributors-list:mainfrom

renovate-bot:renovate/davidanson-markdownlint-cli2-action-21.xrenovate-bot/koppor-_-github-contributors-list:renovate/davidanson-markdownlint-cli2-action-21.xCopy head branch name to clipboard