update-per-categories-feedback (#707)

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# NO TICKET
See slack conversation:
https://bigcommerce.slack.com/archives/C05GVCPFW66/p1734016532530049

## What changed?
Updated the categories description

## Release notes draft

Enhancement
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* The newly-released [X feature] is now available to use. Now, you’ll be
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## Anything else?
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ping {names}

reference/catalog/products_catalog.v3.yml

@@ -441,6 +441,7 @@ paths:
         - `type`
         - `weight`
         - `price`
+        - `categories` (required when you enable the V2 product experience in the control panel)
 
         **Read-Only Fields**
         - `id`
@@ -6986,7 +6987,7 @@ components:
         categories:
           type: array
           description: |
-            An array of IDs for the categories to which this product belongs. When updating a product, if an array of categories is supplied, all product categories will be overwritten. Does not accept more than 1,000 ID values.
+            An array of IDs for the categories to which this product belongs. You will overwrite all product categories when updating a product and supplying an array of categories. The limit is 1,000 ID values. When you enable the catalog V2 product experience in the control panel, you must include the categories array in the request body.
           required:
             - post
           items: