Use patchStockItem to save stock detail identifier code

src/features/stock/stock-detail-page.js

@@ -605,7 +605,7 @@ export function stockDetailPageData(store) {
       this.identifierState.error = '';
       await runAsyncState(this.identifierState, async () => {
         const identifierCode = normalizeIdentifierCode(this.identifierDraft);
-        const updated = await updateStockItem(store, this.entry.uuid_b64, {
+        const updated = await patchStockItem(store, this.entry.uuid_b64, {
           identifier_code: identifierCode || null,
         });