Steps to reproduce:

1. Go to Data collection -> Discovery
2. Select Create discovery rule, fill out the form
3. Create the discovery rule
4. Edit the rule, change its name and update
5. Edit the rule, change discovery checks and update
6. Go to Reports -> Audit log
7. Audit log only lists the creation and name edit of the rule

Result:
See Audit log display one Add and one Update action
Update action log only lists the discovery rule name change
No log for Update action when discovery rule check was changed

Expected:
Audit log should include all of the changes made in a discovery rule including discovery checks