Update userguide table of contents
- [Check Status of Joined Clusters](#check-status-of-joined-clusters)
- [Unjoin Clusters](#unjoin-clusters)
- [Enabling federation of an API type](#enabling-federation-of-an-api-type)
+ - [Verifying API type is installed on all member clusters](#verifying-api-type-is-installed-on-all-member-clusters)
- [Disabling federation of an API type](#disabling-federation-of-an-api-type)
- [Deletion policy](#deletion-policy)
- [Example](#example)
