Release gitlab-experiment version 0.6.5

Updating gitlab-experiment to version 0.6.5.

• Complete 0.6.5 diff: https://gitlab.com/gitlab-org/gitlab-experiment/-/compare/v0.6.4...release-0.6.5

• Release merge request: https://gitlab.com/gitlab-org/gitlab-experiment/-/merge_requests/136

• Checklist before merging:

  • Diff link is up-to-date and working.
  • Release notes are accurate.
  • Gitlab project has been updated and CI is passing.

This MR is generated by an automated release process. If you'd like to add additional information to the MR description, please do, but keep your changes to the area above the changelog, as that can be replaced by the automation process.

---

0.6.5 Changelog

• Fixes a bug where nil behaviors could allow multiple runs
• Introduces new sticky_to option for better tracking while minimizing cache size
• Adds nested experiment implementation that enables experiment diagramming