Fix json schema for suggested reviewers
What does this MR do and why?
Fix json schema for suggested reviewers
Related to #373173 (closed) and followup for !97622 (diffs)
No risk because
- we allow additional properties
- the database is empty behind a flag
gitlabhq_production=> select count(*) from merge_request_predictions;
count
-------
0
MR acceptance checklist
This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.
-
I have evaluated the MR acceptance checklist for this MR.