build(deps): bump github.com/jsonnet-bundler/jsonnet-bundler in /scripts

Bumps [github.com/jsonnet-bundler/jsonnet-bundler](https://github.com/jsonnet-bundler/jsonnet-bundler) from 0.4.0 to 0.5.1.
- [Release notes](https://github.com/jsonnet-bundler/jsonnet-bundler/releases)
- [Changelog](https://github.com/jsonnet-bundler/jsonnet-bundler/blob/master/CHANGELOG.md)
- [Commits](https://github.com/jsonnet-bundler/jsonnet-bundler/compare/v0.4.0...v0.5.1

)

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

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