Fix typo in project settings that prevents users from enabling container registry.
What does this MR do?
Fixes a typo introduce here - https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/6396/diffs#a32da08493b43d29df811f2eb1a2542501ad3140_97_104 - that prevents user from enabling container registry in project settings.
What are the relevant issue numbers?
Fixes #23575 (closed)