Fixed available subscription tier

doc/user/ai_experiments.md

@@ -95,7 +95,7 @@ language model referenced above.
 ## Forecast deployment frequency with Value stream forecasting
 
 DETAILS:
-**Tier:** Freely available for Premium and Ultimate for a limited time for self-managed and GitLab.com. In the future, will require [GitLab Duo Enterprise](../subscriptions/subscription-add-ons.md). For GitLab Dedicated, you must have GitLab Duo Enterprise.
+**Tier:** Freely available for Ultimate for a limited time for self-managed and GitLab.com. In the future, will require [GitLab Duo Enterprise](../subscriptions/subscription-add-ons.md). For GitLab Dedicated, you must have GitLab Duo Enterprise.
 **Offering:** GitLab.com, Self-managed, GitLab Dedicated
 **Status:** Experiment