[INTERNAL] sap.m.BusyDialog: clarification in documentation for  close event is added
[INTERNAL] sap.m.BusyDialog: clarification in documentation for  close event is added

BCP: 1870462453
Fixes: https://github.com/SAP/openui5/issues/2275

Change-Id: I0e467efb486aa2dee9059b5b6fe9c1d5d657ea9d

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