chore(*): update failing test for row pinning

Author: nrobakova

projects/igniteui-angular/src/lib/grids/grid/grid-row-pinning.spec.ts

@@ -1034,6 +1034,7 @@ describe('Row Pinning #grid', () => {
             fix.componentInstance.pinningConfig = { columns: ColumnPinningPosition.Start, rows: RowPinningPosition.Bottom };
             grid.getRowByIndex(5).pin();
             grid.getRowByIndex(1).pin();
+            await wait(DEBOUNCE_TIME);
             fix.detectChanges();
 
             grid.navigateTo(26);