Bump org.testng:testng from 7.8.0 to 7.9.0

Bumps [org.testng:testng](https://github.com/testng-team/testng) from 7.8.0 to 7.9.0.
- [Release notes](https://github.com/testng-team/testng/releases)
- [Changelog](https://github.com/testng-team/testng/blob/master/CHANGES.txt)
- [Commits](testng-team/testng@7.8.0...7.9.0)

---
updated-dependencies:
- dependency-name: org.testng:testng
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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