Merge pull request #9279 from arjenw/patch-11

Update best-practices.md as inheritance is supported by 10.21

Author: ConnorLand

content/en/docs/refguide/mobile/building-efficient-mobile-apps/offlinefirst-data/best-practices.md

@@ -102,7 +102,11 @@ Many-to-many associations are not supported. A common alternative is to introduc
 
 ### Inheritance {#inheritance}
 
-It is not possible to use more than one entity from a generalization or specialization relation. For example if you have an `Animal` entity and a `Dog` specialization, you can use either use `Animal` or `Dog`, but not both from your offline profile. An alternative pattern is to use composition (for example, object associations).
+In Mendix 10.21 and above there is no limitation to the use of inheritance in offline apps, and inheritance is fully supported for offline apps.
+
+{{% alert color="info" %}}
+In Studio Pro 10.20 and below, it is not possible to use more than one entity from a generalization or specialization relation. For example if you have an `Animal` entity and a `Dog` specialization, you can use either use `Animal` or `Dog`, but not both from your offline profile. An alternative pattern is to use composition (for example, object associations).
+{{% /alert %}}
 
 ### System Members {#system-members}