Bump VERSION to 4.6.0
Diff: https://gitlab.com/gitlab-org/gitlab-qa/compare/v4.5.0...e18d76b309e42888759c1effe96767f13e34ae55
Release notes:
### Scenario changes
- !295 Disable `Rack::Attack` throttling by default in `Component::Gitlab`.
Closes #420 (closed).
Edited by George Koltsov