Bump github.com/aquasecurity/trivy from 0.48.3 to 0.50.0 in /hack/tools

Bumps [github.com/aquasecurity/trivy](https://github.com/aquasecurity/trivy) from 0.48.3 to 0.50.0.
- [Release notes](https://github.com/aquasecurity/trivy/releases)
- [Changelog](https://github.com/aquasecurity/trivy/blob/main/goreleaser.yml)
- [Commits](aquasecurity/trivy@v0.48.3...v0.50.0)

---
updated-dependencies:
- dependency-name: github.com/aquasecurity/trivy
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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