[PUI] Fix BOM table (#8162)

- Fix column accessor
- Fixes column header
- Enables column sorting

src/frontend/src/tables/bom/BomTable.tsx

@@ -83,7 +83,7 @@ export function BomTable({
   const tableColumns: TableColumn[] = useMemo(() => {
     return [
       {
-        accessor: 'part',
+        accessor: 'sub_part',
         switchable: false,
         sortable: true,
         render: (record) => {