add enterprise feature callout

Author: rpmccarter

settings/authentication-personalization/authentication.mdx

@@ -3,6 +3,10 @@ title: 'Authentication'
 description: 'Features available with the Authentication product'
 ---
 
+<Note>
+  Authentication is an enterprise feature. To get access, [contact sales](mailto:[email protected]).
+</Note>
+
 As the name suggests, Authentication offers full privacy for all of your
 documentation content. This includes all of the following:
 

settings/authentication-personalization/personalization.mdx

@@ -3,6 +3,10 @@ title: 'Personalization'
 description: 'A list of features unlocked with Personalization'
 ---
 
+<Note>
+  Personalization is an enterprise feature. To get access, [contact sales](mailto:[email protected]).
+</Note>
+
 Personalization refers to a suite of features that allow you to customize your
 documentation experience based on some information about the user. There are
 three major features of Personalization: