Corrects date for when AWS Codebuild SCM integration was released

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/152690



Merged-by: Marcel Amirault <mamirault@gitlab.com>
Approved-by: Marcel Amirault <mamirault@gitlab.com>
Co-authored-by: Loren Gordon <loren@fleet-it.com>