docs: fix text in payload guide (#13815)

www/apps/book/public/llms-full.txt

@@ -89715,7 +89715,7 @@ You create a `Products` collection having the following fields:
 - `options`: An array of product options, such as size or color.
 - `variants`: An array of product variants, each with its own title and option values.
 
-All of these fields will be filled from Medusa, and will be synced back to Medusa when the product is updated in Payload.
+All of these fields will be filled from Medusa.
 
 In addition, you also add the following [access-control](https://payloadcms.com/docs/access-control/overview) configurations: