traceability documentation should mention how to enable the expert/semantic property tab

[Kellindil]

The documentation describes how the SID allows for traceability between the transition source and target elements. However, this does not mention that the "semantic" tab is disabled by default, nor how to activate it. There should either be a link to https://github.com/eclipse-capella/capella/wiki/Release-Notes-6.1.0#expert-tab-and-semantic-tab-in-properties-views-have-been-hidden-by-default or a description of how to access and activate this capability.

https://github.com/eclipse-capella/capella-sss-transition/blob/master/plugins/org.polarsys.capella.transition.system2subsystem.doc/html/User%20Manual/14.3.%20System%20to%20Subsystem-Traceability.html