We haven't deployed AnyConnect client to users, but are looking at doing so. For others reading, check out this FAQ on the Meraki documentation site for licensing information on MX.
Also to note, I believe the initial modal you're referencing indicated that AnyConnect client was not something that came with additional cost while MX's AnyConnect client support was still in beta. It is still currently in beta, per the Dashboard:
However, the point of the post isn't to dive into the licensing of AnyConnect client, but to have the links on the Dashboard updated so as to not point to an old version of AnyConnect client. Here's to hoping that happens 🤞🏻🤞🏻🤞🏻