chore(deps-dev): bump snyk from 1.226.1 to 1.239.3 in /core

Bumps [snyk](https://github.com/snyk/snyk) from 1.226.1 to 1.239.3.
- [Release notes](https://github.com/snyk/snyk/releases)
- [Changelog](https://github.com/snyk/snyk/blob/master/.releaserc)
- [Commits](snyk/cli@v1.226.1...v1.239.3)

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