Lower the visibility of documentation about old JWT
Problem to solve
As mentioned in #366798 (comment 1378386769), the old JWTs are going to stick around to 16.5 to reduce the risk of widespread breaking changes for users. To help move people off these tokens, which are less secure than ID tokens, we should add a stronger warning, and reduce the visibility of docs relating to them (they are already noted as deprecated).
Further details
Proposal
Who can address the issue
Other links/references
Edited by Marcel Amirault