Inconsistent Docs on if_ci_failed

Description

The if_ci_failed config field has inconsistent docs.

In the commit-status header: Status Checks

        if_ci_failed: error #success, failure, error, ignore

In the actual section: Status Checks

Only documents error and success.

Can we document if_ci_failed’s failure and ignore fields?

@jamesbraza good point, we’ll take a look here.