chore(deps): bump mkdocs-section-index from 0.3.6 to 0.3.7 (#91)

Bumps [mkdocs-section-index](https://github.com/oprypin/mkdocs-section-index) from 0.3.6 to 0.3.7.
- [Release notes](https://github.com/oprypin/mkdocs-section-index/releases)
- [Commits](oprypin/mkdocs-section-index@v0.3.6...v0.3.7)

---
updated-dependencies:
- dependency-name: mkdocs-section-index
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>