Mention deprecation of subscription on personal namespace
Related to:
gitlab-org&6380 gitlab-org/gitlab!83840 (merged)
Please provide a brief explanation for this change:
Update the docs to mention the deprecation of subscriptions on personal namespaces. This update aims to be in sync with the decisions noted in Deprecate subscriptions for Personal Namespaces (gitlab-org&6380)
However, it should be noted that there is a loophole on CustomersDot that still allows applying a subscription on a personal namespace. Some customers have applied their subscriptions on their personal namespaces using this method.