Add testing instructions for release

Author: opr

docs/internal-developers/testing/releases/880.md

@@ -0,0 +1,19 @@
+# Testing notes and ZIP for release 8.8.0
+
+Zip file for testing: [woocommerce-gutenberg-products-block.zip](https://github.com/woocommerce/woocommerce-blocks/files/9851305/woocommerce-gutenberg-products-block.zip)
+
+## Feature plugin and package inclusion in WooCommerce
+
+### Fix mini cart items alignment issues in Editor. ([7387](https://github.com/woocommerce/woocommerce-blocks/pull/7387))
+
+1. Add a mini cart to a new post
+2. Select mini cart block and click on `Edit mini cart template part` from sidebar
+![image](https://user-images.githubusercontent.com/16707866/195553558-49c48e77-adfb-4e5e-a36f-72e6eeddacc5.png)
+3. Editor UI should be the same as the frontend UI.
+
+### Fixes a fatal error with Cart Block usage in specific site configurations with multiple shipping countries. ([6896](https://github.com/woocommerce/woocommerce-blocks/pull/6896))
+
+1. Configure multiple shipping countries.
+2. Setup the cart block for use on the site.
+3. Verify there are no errors when displaying the cart in the editor or on the frontend (especially around any shipping options).
+

docs/internal-developers/testing/releases/README.md

@@ -96,6 +96,7 @@ Every release includes specific testing instructions for new features and bug fi
     -   [8.7.2](./872.md)
     -   [8.7.3](./873.md)
     -   [8.7.4](./874.md)
+-   [8.8.0](./880.md)
 
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