Bump react-markdown from 5.0.3 to 6.0.0 in /ui
Bump react-markdown from 5.0.3 to 6.0.0 in /ui

Bumps [react-markdown](https://github.com/remarkjs/react-markdown) from 5.0.3 to 6.0.0.
- [Release notes](https://github.com/remarkjs/react-markdown/releases)
- [Changelog](https://github.com/remarkjs/react-markdown/blob/main/changelog.md)
- [Commits](https://github.com/remarkjs/react-markdown/compare/5.0.3...6.0.0)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
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