Add pre 11.6 docs for one way navigable associations

Co-authored-by: Mark van Ments <35492184+MarkvanMents@users.noreply.github.com>

Author: jelmersnippe

content/en/docs/refguide/modeling/domain-model/associations/association-properties.md

@@ -82,7 +82,7 @@ One-way navigable associations are associations that allow navigation to associa
 
 You can retrieve data from all other domain model associations in both directions.
 
-One-way navigable associations are represented by an icon next to the association name showing the direction of its navigability.
+One-way navigable associations are represented by an icon next to the association name showing the direction of its navigability. In Mendix versions below 11.6.0, they are also shown with a dashed arrow.
 
 ### On Delete Behavior {#delete-behavior}