Docs out of sync

Description

I was looking to update the Redis docs to add the use of master password but while I don't see them in the docs (attached image):

The change is actually included at https://gitlab.com/gitlab-org/gitlab-ee/blob/sentinel-psswd-docs/doc/administration/high_availability/redis.md#step-4-configuring-the-gitlab-application.

There might be something pretty obvious I'm missing.

Would you mind helping me out @axil?