[FIX] core/Router: adapted JSDOC for #getTarget to be public
[FIX] core/Router: adapted JSDOC for #getTarget to be public

Change-Id: I7d07e9def6d5c5936333074b4bb0225b0132d4f8
Fixes: https://github.com/SAP/openui5/issues/2031
BCP: 1880272477

cschuff/openui5,SAP/openui5,SAP/openui5,cschuff/openui5,SAP/openui5,SAP/openui5,cschuff/openui5