chore(deps-dev): bump @shikijs/markdown-it from 1.24.4 to 1.26.1 in /ui

Bumps [@shikijs/markdown-it](https://github.com/shikijs/shiki/tree/HEAD/packages/markdown-it) from 1.24.4 to 1.26.1.
- [Release notes](https://github.com/shikijs/shiki/releases)
- [Changelog](https://github.com/shikijs/shiki/blob/main/CHANGELOG.md)
- [Commits](https://github.com/shikijs/shiki/commits/v1.26.1/packages/markdown-it)

---
updated-dependencies:
- dependency-name: "@shikijs/markdown-it"
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>