[INTERNAL] sap.m.PlanningCalendar: StickyHeader Property Docu Update
[INTERNAL] sap.m.PlanningCalendar: StickyHeader Property Docu Update

The documentation of the stickyHeader property has been updated to state
that the PlanningClaendar now uses the sticky property of sap.m.Table.

Change-Id: I777801e9fe622e98201e484ea072fe7bbb93795c

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