chore(deps-dev): bump jest from 24.9.0 to 26.6.1 in /api-server

Bumps [jest](https://github.com/facebook/jest) from 24.9.0 to 26.6.1.
- [Release notes](https://github.com/facebook/jest/releases)
- [Changelog](https://github.com/facebook/jest/blob/master/CHANGELOG.md)
- [Commits](jestjs/jest@v24.9.0...v26.6.1)

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