Split the PRs by category in testing notes of 5.3.0

Author: ralucaStan

docs/testing/releases/530.md

@@ -2,6 +2,8 @@
 
 Zip file for testing: [woocommerce-gutenberg-products-block.zip](https://github.com/woocommerce/woocommerce-gutenberg-products-block/files/6608747/woocommerce-gutenberg-products-block.zip)
 
+## Feature plugin only
+
 ### Hide the Cart and Checkout blocks from the new block-based widget editor. ([4303](https://github.com/woocommerce/woocommerce-gutenberg-products-block/pull/4303))
 
 1. Using a classic theme (ie: Storefront) with Gutenberg enabled, go to Appearance > Widgets.
@@ -40,6 +42,8 @@ Zip file for testing: [woocommerce-gutenberg-products-block.zip](https://github.
 3. Add an item to the cart with a zero-rated tax rate.
 4. Check there are no borders without anything in them, like the before screenshot above.
 
+## Feature plugin and package inclusion in WooCommerce core
+
 ### Fix an issue where an attempt to add an out-of-stock product to the cart was made when clicking the "Read more" button. ([4265](https://github.com/woocommerce/woocommerce-gutenberg-products-block/pull/4265))
 
 1. Go to 'WooCommerce > Settings > Products > Enable AJAX add to cart buttons on archives