Fix markdown layout of incident issues

Merged Peter Leitzen requested to merge pl-incident-issue-hline into master

What does this MR do?

This MR fixes a markdown layout ~bug by adding a single newline to the markdown separate in the issue description.

I've noticed this ~bug when testing #200012 (comment 289344942) hence the Stuff that should Just Work label.

Screenshots

Before After
Screenshot_from_2020-02-18_12-04-45 Screenshot_from_2020-02-18_12-07-26

Does this MR meet the acceptance criteria?

Conformity

Availability and Testing

Security

If this MR contains changes to processing or storing of credentials or tokens, authorization and authentication methods and other items described in the security review guidelines:

  • [-] Label as security and @ mention @gitlab-com/gl-security/appsec
  • [-] The MR includes necessary changes to maintain consistency between UI, API, email, or other methods
  • [-] Security reports checked/validated by a reviewer from the AppSec team
Edited by Peter Leitzen