chore(deps-dev): bump mkdocs-include-markdown-plugin from 7.1.7 to 7.2.1

Bumps [mkdocs-include-markdown-plugin](https://github.com/mondeja/mkdocs-include-markdown-plugin) from 7.1.7 to 7.2.1.
- [Release notes](https://github.com/mondeja/mkdocs-include-markdown-plugin/releases)
- [Commits](mondeja/mkdocs-include-markdown-plugin@v7.1.7...v7.2.1)

---
updated-dependencies:
- dependency-name: mkdocs-include-markdown-plugin
  dependency-version: 7.2.1
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]