Split threat management and update links

This MR updates the GitLab Bot to separate threat insights and container security, as threat management no longer exists.

Action items

• [-] (If applicable) Add documentation to the handbook pages for Triage Operations => N/A
• (If applicable) Identify the affected groups and how to communicate to them:
  • /cc @person_or_group => @thiagocsf @lkerr
  • Relevant Slack channels => #g_secure_threat_insights #g_protect_container_security
  • Week-in-review