Bump highcharts from 7.2.1 to 9.0.0 in /ui/ui

Bumps [highcharts](https://github.com/highcharts/highcharts-dist) from 7.2.1 to 9.0.0.
- [Release notes](https://github.com/highcharts/highcharts-dist/releases)
- [Commits](highcharts/highcharts-dist@v7.2.1...v9.0.0)

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

Author: dependabot[bot]