Update the Blender collision empties tip for Blender 2.80+ (#4204)

Co-authored-by: Hugo Locurcio <[email protected]>

getting_started/workflow/assets/importing_scenes.rst

@@ -431,8 +431,11 @@ reliability.
 
 .. note::
 
-    For better visibility in Blender's editor, you can set the "X-Ray" option
-    on collision empties and set some distinct color for them in Blender's
+    For better visibility on Blender's editor, you can set the "X-Ray" option
+    on collision empties and set some distinct color for them by changing
+    **Edit > Preferences > Themes > 3D Viewport > Empty**.
+    
+    If using Blender 2.79 or older, follow these steps instead:
     **User Preferences > Themes > 3D View > Empty**.
 
 .. seealso::