docs: fix incorrect getOffset() usage in ComboBox JavaDoc (#6900) (#6901

)

Co-authored-by: Serhii Kulykov <[email protected]>

vaadin-combo-box-flow-parent/vaadin-combo-box-flow/src/main/java/com/vaadin/flow/component/combobox/ComboBoxBase.java

@@ -801,7 +801,7 @@ public ComboBoxLazyDataView<TItem> getLazyDataView() {
      * <p>
      * {@code comboBox.setItemsWithFilterConverter(
      * query -> orderService.getOrdersByCount(query.getFilter(),
-     * query.getOffset,
+     * query.getOffset(),
      * query.getLimit()),
      * orderCountStr -> Integer.parseInt(orderCountStr));} Note: Validations for
      * <code>orderCountStr</code> are omitted for briefness.
@@ -840,7 +840,7 @@ public <C> ComboBoxLazyDataView<TItem> setItemsWithFilterConverter(
      * <p>
      * {@code comboBox.setItemsWithFilterConverter(
      * query -> orderService.getOrdersByCount(query.getFilter(),
-     * query.getOffset,
+     * query.getOffset(),
      * query.getLimit()),
      * query -> orderService.getSize(query.getFilter()),
      * orderCountStr -> Integer.parseInt(orderCountStr));} Note: Validations for
@@ -921,14 +921,14 @@ public ComboBoxLazyDataView<TItem> setItems(
      * exact size. Usage example without component provided filter:
      * <p>
      * {@code comboBox.setItems(
-     * query -> orderService.getOrders(query.getOffset, query.getLimit()),
+     * query -> orderService.getOrders(query.getOffset(), query.getLimit()),
      * query -> orderService.getSize());}
      * <p>
      * Since ComboBox supports filtering, it can be fetched via
      * query.getFilter():
      * <p>
      * {@code comboBox.setItems(
-     * query -> orderService.getOrders(query.getFilter(), query.getOffset,
+     * query -> orderService.getOrders(query.getFilter(), query.getOffset(),
      * query.getLimit()),
      * query -> orderService.getSize(query.getFilter()));}
      * <p>