build(deps): bump react-diff-viewer-continued in /superset-frontend

Bumps [react-diff-viewer-continued](https://github.com/aeolun/react-diff-viewer-continued) from 3.2.5 to 3.4.0.
- [Release notes](https://github.com/aeolun/react-diff-viewer-continued/releases)
- [Changelog](https://github.com/Aeolun/react-diff-viewer-continued/blob/v3.4.0/CHANGELOG.md)
- [Commits](Aeolun/react-diff-viewer-continued@v3.2.5...v3.4.0)

---
updated-dependencies:
- dependency-name: react-diff-viewer-continued
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>