Bump VERSION to 1.14.0

• Diff: https://gitlab.com/gitlab-org/gitlab-triage/compare/v1.13.0...3830314

• Release notes:

### New features and features updates

- !180 Add ability to triage issues/merge requests with threads/discussions.

• Checklist before merging:

  • Diff link is up-to-date.
  • Based on the diff, lib/gitlab/triage/version.rb is updated, according to SemVer.
  • Release notes are accurate.

• Checklist after merging:

  • Update the release notes for the newly created tag.