Documentation fix; correct usageRightsConfigProvider class name for GuardianUsageRightsConfig

[tonytw1]

What does this change?

The canonical class name of GuardianUsageRightsConfig needs a trailing $ in the configuration now that it's a Scala object.

How should a reviewer test this change?

How can success be measured?

Who should look at this?

Tested? Documented?

• [ ] locally by committer
• [ ] locally by Guardian reviewer
• [ ] on the Guardian's TEST environment
• [ ] relevant documentation added or amended (if needed)

[prout-bot]

Seen on auth, usage, image-loader, metadata-editor, thrall, leases, cropper, collections, media-api, kahuna (created by @tonytw1 and merged by @andrew-nowak 8 minutes and 39 seconds ago) Please check your changes!