[e2e test] Fix locator for customer combobox in create order test (#45983)

plugins/woocommerce/changelog/e2e-fix-create-order-test-fix

@@ -0,0 +1,4 @@
+Significance: patch
+Type: dev
+
+E2E tests: fix locator in create order tests

plugins/woocommerce/tests/e2e-pw/tests/merchant/create-order.spec.js

@@ -361,7 +361,9 @@ test.describe( 'WooCommerce Orders > Add new order', () => {
 
 		// Select customer
 		await page.getByText( 'Guest' ).click();
-		await page.getByRole( 'combobox' ).nth( 4 ).fill( 'sideshowbob@' );
+		await page
+			.locator( 'input[aria-owns="select2-customer_user-results"]' )
+			.fill( 'sideshowbob@' );
 		await page.getByRole( 'option', { name: 'Sideshow Bob' } ).click();
 
 		// Add a product