Bump minimal-mistakes-jekyll from 4.24.0 to 4.25.1 in /docs (#1259)

Bumps [minimal-mistakes-jekyll](https://github.com/mmistakes/minimal-mistakes) from 4.24.0 to 4.25.1.
- [Release notes](https://github.com/mmistakes/minimal-mistakes/releases)
- [Changelog](https://github.com/mmistakes/minimal-mistakes/blob/master/CHANGELOG.md)
- [Commits](https://github.com/mmistakes/minimal-mistakes/compare/4.24.0...4.25.1)

---
updated-dependencies:
- dependency-name: minimal-mistakes-jekyll
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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