Bumps [peaceiris/actions-mdbook](https://github.com/peaceiris/actions-mdbook) from 1.2.0 to 2.0.0.
- [Release notes](https://github.com/peaceiris/actions-mdbook/releases)
- [Changelog](https://github.com/peaceiris/actions-mdbook/blob/main/CHANGELOG.md)
- [Commits](
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| .. | ||
| ISSUE_TEMPLATE | ||
| workflows | ||
| CODEOWNERS | ||
| FUNDING.yml | ||
| ISSUE_TEMPLATE.md | ||
| PULL_REQUEST_TEMPLATE.md | ||
| SUPPORT.md | ||
| dependabot.yml | ||