Update DB docs to match how we re-generate them

What does this MR do and why?

This is to avoid any changes after db dosc are re-generated.

How to set up and validate locally

1. On current master after you run db:migrate, there will be changes to db/docs/scan_result_policies.yml
2. On this branch there should be no changes to any file under db/docs after db:migrate

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.