Add prepare section to security release template
What does this MR do?
Add a new section to the security release template to coordinate with the GitLab Release Managers
Why was this MR needed?
A corrective action of gitlab-com/gl-infra/delivery#2383 (closed)
What's the best way to test this MR?
There might be some specs on the pipeline to catch lint errors
What are the relevant issue numbers?
Edited by Mayra Cabrera